Fantastic Journey: How Scientists Figured Out the Shape and Size of the Earth
by Joy Hakim
This article below is excerpted
from her six-volume series The Story of Science
©2004 Smithsonian Books
There is something
I want to be sure you understand before you finish this article. It’s this:
Science is not about certainty; it’s about uncertainty. Does that sound
weird? Well, it’s true. Science is all about trying ideas, discarding those
that don’t work, and building on those that do. It never stops.
As you know,
scientifically minded serious thinkers once “proved” that the Earth was
flat. They walked around and observed carefully and made that judgment. It
helped them plan their lives. Then someone came along and “proved” the
Earth is a globe in the center of the universe. And that worked. And then
someone else came along and “proved” that the Sun is in the center of the
universe, and that worked, until someone else came along and “proved” that
the universe has no center, and….
Well, you get the
point. Those people in the past who had wrong ideas weren’t dummies. They
were doing the best they could, given the knowledge of their times. We do the
same thing today. And you can be sure that people in the future will look back
and wonder why we believe some of the things we do. Good scientists know that.
They learn to be humble. Does that make science unimportant? After all, if
some of our scientific theories are going to be proved false, why bother
uncertainty is the most interesting of all places to be. If you believe
something is an absolute truth, you can just memorize it and get on with your
life. There’s nothing to discuss.
like that at all. Scientists—the good ones—are always questioning and
questing. Yes, there are scientific ideas, often called principles or theories
that have proved themselves over time. Then they get called facts, or laws. By
using those laws, modern science has achieved incredible things. But nothing
is beyond question to the scientific mind—even those laws. So no good
scientist will laugh at you for asking questions—because sometimes the
silliest seeming questions have led to the most profound answers.
understand how science progresses, let’s begin with the Sumerians’
thoughts on the Earth and then take a look at the roughly 2,000 years in which
scholars debated whether the Earth is round or flat, big or little.
The universe was
called an-ki, which meant “sky-earth.” The wise ones, who were
deep thinkers and observers, said the sky was like an upside-down soup
dish—solid and bowl shaped. Some called it a heavenly vault. Perhaps it was
fashioned of tin, although more than a few thought it was made of the
beautiful blue gemstone lapis lazuli. Others said there were three layers of
translucent crystal. Stars, which were celestial fires, shone through holes in
that glorious roof. Water was stored between the layers, they said. When a
hole got unplugged, it rained.
And the Earth? It
was a flat disk set in a surrounding ocean. Below Earth was the vast
underworld. Each night it was visited by the Sun. Once a month, the Moon made
the same journey to the lower region.
From where did
life come? From the ocean—which was eternal; out of it had come everything
These were the thoughts of the Sumerians, who, 5,000 years ago, created what may have been the world’s first great civilization. Their ancient myths were important, they were part of a process that would stretch minds. But science was still an infant, just taking baby steps out of the cradle. It would take another 2,000 years for stargazers to start trying to answer the big questions of the universe in a scientific way.
* * *
Along the Aegean
Sea, Mother Earth is no shy flower. There, though spectacularly beautiful, she
is also boisterous and hard to tame. Crops grow poorly. Earthquakes and
volcanoes terrify and leave scars. The sea swallows its victims. The
Greek-speaking people, who settled sea-washed Turkey, Greece, and the islands
between, needed sharp minds to survive, and they developed them. About 3,000
years ago, some of them began using their minds in new ways. It was a time
when superstition and fear still guided most thought and action. Rulers who
claimed godly powers told subjects what to think. But in Ionia, on the Turkish
coast, there were no god-kings. There, cities thrived. Traders and travelers
brought new ideas. Ordinary people were free to think for themselves. A few,
who examined the world with clear, unfrightened minds, drew conclusions from
what they observed.
astronomer Carl Sagan, “in Ionia, a new concept developed, one of the great
ideas of the human species. The universe is knowable, the ancient Ionians
argued… There are regularities in Nature that permit its secrets to be
uncovered. Nature is not entirely unpredictable; there are rules even she must
a sixth-century b.c.e. Ionian living in the prosperous port of Miletus, is
said to be the world’s first philosopher-scientist-mathematician; the first
to look for explanations in observed facts, not myths; the first scientist to
leave his name on his ideas.
A road went from
Thales’ home in Miletus to the fabled city of Babylon, where the savvy ruler
Nebuchadnezzar (neb-uh-kuhd-NEZ-uhr) had a stable of astronomers at work.
(Babylonia had succeeded Sumer as the leading culture in Mesopotamia.) From
Babylon, traders and scholars went to India and Mongolia and China, learned of
those cultures, and brought home goods that dazzled. Back in Ionia, they were
joined by soldiers, returned from the Persian Wars. The soldiers bragged of
their army’s engineers, who had built marvels. Some were now working in the
Given all this
intellectual ferment, Thales may have been exasperated by the fickle gods
worshiped by most people of his time. Perhaps he realized the importance of a
fresh start that turned away from myths toward observation and thought. He
would use no gods to explain nature. Rather, he would use his senses and his
intelligence and teach others to do the same. It was the beginning of the
Earth Flat or Round?
Thales did a new kind of thinking, but it might not have gone anywhere if he hadn’t been a teacher. Anaximander (ca. 611-ca. 547 b.c.e.), who was a pupil of Thales, is often called the Founder of Astronomy. That’s not quite true. People had been looking at the stars from the earliest of times. But Anaximander did do something new. He tried to picture the whole Earth and understand its place in the cosmos. He figured out that the Earth’s surface must be curved (that explains the changing position of stars when one travels). And, in a breakthrough thought, he described the sky as a transparent sphere that moves and carries the Sun and stars; it was not just an arch over the Earth.
Anaximander’s Earth wasn’t a sphere. It was a kind of pudgy cylinder with
a top that had a north-south curve. Earth stood all day by itself in the
middle of the universe. Nothing was holding it, said Anaximander. That idea of
an unsupported Earth was hard for most people to imagine; it took a big
intellectual leap. Once it was made, it wasn’t difficult to go from a
freestanding cylinder to a free-floating globe, as Pythagoras (pi-THAG-uh-ruhs)
did just a few decades later.
was born in ca. 582 b.c.e., is often called the world’s first great
mathematician. He was lucky in the time and place of his growing up. His home
was on the island of Samos, just a mile’s swim in the Aegean Sea from the
coast of Turkey.
was a boy, Samos was a big-time prosperous port. Ships carrying new ideas
seemed to blow in on almost every breeze. The Greek historian Herodotus tells
us that the people of Samos “are responsible for three of the greatest
building and engineering feats in the Greek world.” If we take ourselves to
Samos in the sixth century b.c.e., you can see those engineering marvels: a
spectacular tunnel channeling water pipes through a big hill, a man-made
harbor, and the largest of all known Greek temples.
It is an age of
ferment—and genius. Besides Thales and Anaximander in Ionia, there are
Confucius (kuhn-FYOO-shuhs) and Lao-tzu (rhymes with “now-duh”) in China,
the Pharaoh Necho (NEE-ko) in Egypt, Zoroaster (ZOR-oh-as-ter) in Persia, the
Jewish prophets in Israel, and Gautama Buddha in India. Pythagoras has a mind
that can hold its own with any of them.
Samos was part of
Ionia, but no one considers Pythagoras as an Ionian because he didn’t think
like the other Ionian scientists. He stands alone.
How do you make
sense of the universe? Do you do it by considering mountains of
information—observing this, observing that—adding one block of knowledge
to another? Believe that, and you’re an Ionian-style scientist.
Or, is it an
orderly, perfect creation that can be understood through mathematical formulas
and headwork? Believe that, and you’re thinking like Pythagoras.
today’s scientific method combines approaches, pure thinking along with
observation, as well as something essential to modern
science—experimentation that leads to proofs. But it took a long time to get
that method working. The Greeks didn’t do much experimenting.
the way to understand the universe was by searching for things that are
absolutely true, and numbers seemed perfect for that quest. “All is
number,” he said. And he meant it. Everything in the world, he believed,
could be explained through mathematics. He went still further: He thought
numbers were divine, an expression of God’s mind.
We don’t have
any books or papers or words that Pythagoras actually wrote. All of his work
has been lost. But we know enough from the writings of others, who tell of him
and his achievements, to realize he was one of the most influential people of
There is an
exactness to the world, an orderliness, and it follows rules that can be
understood with numbers: that’s what Pythagoras told us, and it has been
confirmed again and again.
If all this
isn’t enough, Pythagoras is thought to be the first person to teach that the
Earth is a sphere. (He took the next step after Anaximander’s squatty
astonishing feat, to understand that Earth is a big ball (a slightly
out-of-shape ball, as we now know). Would you have figured out its spherical
shape if you hadn’t been told? And that still isn’t all: Pythagoras
understood that Earth moves!
explained the motion of the Sun and stars by saying that they are all attached
to a heavenly sphere that rotates, carrying them in its grip. Pythagoras
accepted that idea, but in his cosmology, the Earth, the Sun, and the planets
are not attached to the same heavenly sphere as the stars: they follow
different paths; some, like Earth, are circling a great celestial fireball.
Take note of that fireball—Earth is not in the center in this universe.
Pythagoras introduced the idea of multiple spheres. For way more than 1,000
years afterward, astronomers would worry about separate spheres for the Sun
and planets. (Finally, modern science came up with gravity, smashing those
thinker and observer understood that the structure and relationships of the
universe can be described with mathematical formulas. He made mathematics the
language of Western science. No one has done more.
Within 200 years
after Pythagoras, Greek thinkers seem to have agreed that the Earth is round.
Sky gazers had figured out that the round shape on the Moon during a lunar
eclipse is our planet’s shadow. Since those sky gazers were apt to be the
wisest of scholars, it was a heavy nail in the flat-Earth coffin.
There were others.
The Greeks traveled widely in the Mediterranean lands. They knew that the
North Star is lower in the sky in southern Egypt than it is in northern
Greece. A round Earth explains that. And they also knew that the first one
sees of a ship coming over the horizon is its sail; only later does the hull
come into view. That seemed to confirm the round-world theory. But knowing the
shape of the Earth wasn’t enough. Scholars also wanted to know how big the
Earth is. That was a question for Eratosthenes.
Earth Big or Small?
Eratosthenes (ca. 275-ca 195 b.c.e.), who was born in coastal North Africa (now Libya), went to school in Athens and then was called to Egypt by Ptolemy III, who asked him to become director of the library/museum/university at Alexandria. He was the perfect person for that job. Eratosthenes (er-uh-TOS-thuh-neez) was a great scholar himself, and he energized others. His nickname was “Beta,” which is the second letter in the Greek alphabet. Some people thought him second only to Aristotle in broad talent. Today Eratosthenes is remembered mostly because of some measuring he did.
discovered that at noon on the summer solstice (the longest day of the year),
at Syene (an Egyptian city near modern Aswân on the southern Nile), the
Sun’s rays lit the very bottom of a deep well, and a stick cast no shadow at
That wasn’t true
at Alexandria, on the northern mouth of the Nile, where at the same time on
the same day, the Sun’s rays did cast a shadow.
have asked himself, “Why a shadow at Alexandria and no shadow at Syene?”
Then he figured out that the Sun might be right overhead at Syene but not
quite overhead at Alexandria, and he realized that he had hit upon valuable
information. He saw it as yet another indication that the Earth is curved and
as an opportunity to find out the circumference of the Earth.
said to have put a stick in the ground in Alexandria and measured the angle of
its shadow. It was 7.2°, which is Z\b/ of a circle. If the Earth is truly a
globe—as he believed—then the distance between Alexandria and Syene is
Z\b/ of that globe. To find the size of the whole globe, all he had to do was
measure the distance between the two cities. So he paid someone to walk from
Alexandria to Syene, counting his steps, and then he multiplied that distance
by 50. The answer was very close to the best modern measurements of the
circumference of the Earth. That was more than two millennia ago, and the only
equipment Eratosthenes used was a stick in the ground, his brain, and a hired
Given what he
found to be the large size of the Earth and the small size of the known land,
Eratosthenes surmised that there was a huge interconnected ocean. (That would
be verified by the voyage of Magellan 18 centuries later.)
Eratosthenes’ works, like those of most of the ancient thinkers, have been
lost. Much of what we know of him and his accomplishments comes from the
written comments of others. And they tell us that he was a geographer,
historian, and literary critic, as well as an astronomer. He was the first
man, of whom we know, who was concerned with accurate dating. He set up a
chronology that began history with the Trojan War. But it was when he came up
with that close-to-accurate measurement of the Earth that he demonstrated that
the universe is understandable. Given some brainpower, we can figure out how
it works. What would his contemporaries and future generations do with that
insight? For a long time they just forgot all about it.
After some impressive centuries of rule and a time of peace and harmony unusual in human history, the vast and mighty Roman Empire was in trouble. Historians will give you a whole lot of reasons for its decline:
cause, when wild, uncivilized, barbaric tribes began attacking, the empire
started to collapse. It did not happen overnight; it was a long process. Those
barbarians—bands of warring hoodlums—came from the north, and kept coming.
They were being pushed out of their lands by still fiercer hordes who had
fought on horseback all the way across Asia from Mongolia. Wherever they went,
these barbarian tribes brought disaster, destruction, energy, and change.
While the Roman
Empire was tumbling, a new religion was spreading like a grass fire (which
means fast). The new religion was Christianity. It preached love and
brotherhood and brought a vision of a world to come. It was a message of hope.
And it spoke to those who were facing confusion, violence, and wrenching
change in what had once been civilized, secure communities. Christianity led
believers inward, to a quiet, spiritual life. At a time when the known world
was often unbearably brutal, Christians focused on the world of the soul and
the promise of eternal life.
In 313 c.e.,
Emperor Constantine made Christianity a tolerated and lawful religion of the
Roman Empire. Christians, who had been struggling outcasts, began to hold
political as well as spiritual power. Their ideas on science now mattered.
Should priests and bishops encourage Christians to study the natural world? Or
should they urge Christians to concentrate on saving their souls? Studying
science and mathematics meant studying the Greeks. But the Greeks were being
called pagans. If the Greeks were wrong about religion, as the Christians
believed, could they be right about scientific matters? This was a serious,
had taught that the Earth is round. But if the world is round, then some
people must be hanging upside down, said the priests. “Can anyone be so
foolish as to believe that there are men whose feet are higher than their
heads, or places where things may be hanging downwards, trees growing
backwards, or rain falling upwards?” wrote the much-loved African priest and
author Lactantius. (He was tutor to Emperor Constantine’s son.) The side of
the Earth opposite Europe (and below the equator) was called the antipodes
(an-TIP-uh-deez). How could anyone live on the antipodes? The Bible’s
stories seem to make it an impossibility. Belief in a habitable round Earth
was often seen as proof of heresy. (Almost no one understood that there is no
top and bottom nor up and down in space.)
What happened to
that round-Earth idea the Greeks had developed? A sixth-century monk named
Cosmas wrote a 12-volume Topographia Christiana, which was meant to
replace it. The first volume of his work has this title: Against those
who, while wishing to profess Christianity, think and imagine like the pagans
that the heaven is spherical. The Earth, said Cosmas, is
rectangular—twice as long as it is wide—and surrounded by an ocean, which
is surrounded by a second Earth: Adam’s Paradise. The sky is like the roof
of a tent with stars and planets pushed by angels.
Did people believe
Cosmas? Yes, most did. But it didn’t seem to matter much. Hardly anyone was
concerned with the science of the universe. Its moment had passed. No other
culture anywhere had done what the Greeks had done; but now Alexandria was
becoming a forgotten town. Science and question-asking were out of fashion.
The Sumerian idea
of a flat Earth returned—this time richly embroidered with descriptions of
sea monsters and bizarre land creatures. It stayed around for almost 1,000
years. (To give yourself an idea of 1,000 years, it’s twice as long ago as
Columbus’s voyage to America.)
the time between the fall of the Roman Empire (476) and the beginning of the
Renaissance (early 15th century) the Middle Ages. Some divide that medieval
era and call the first of it (from 476 to about 1000) the Dark Ages. Some call
those years the Great Interruption. Whatever name you choose, it describes a
time when most of Europe took a big step backward. Life became coarse and
primitive, not just in comparison to our life today, but in contrast to other
world civilizations of the time, such as the T’ang and Sung dynasties in
China, the Eastern Orthodox Byzantine Empire centered in Constantinople (now
Istanbul, Turkey), and the Islamic Empire (led by the culture-loving Abbasid
The tradition of
scientific question-asking shifted to Arab lands, where it stayed alive for
some five or six centuries and helped create a golden age of Islam.
technology was making enormous strides. Astronomers and mapmakers there were
way ahead of those left in Europe. They were charting regions of the Earth
exactly, although they still hadn’t figured out that Earth was round.
Ships’ rudders, the compass, wheelbarrows, canals with locks, paper,
printing, gunpowder, stirrups, and harnesses—those were just a few of the
ideas and inventions that were eventually carried across the Silk Road
from the East to the West. But neither the Chinese nor the Japanese nor the
Mayans nor any other culture anywhere matched the Greeks when it came to
asking questions about the universe. Without the right questions, you don’t
get the right answers. You don’t even get energetic discussions. These were
dark ages for science and dreadful years for most Europeans—especially for
those with intelligence and imagination.
If anyone, then,
had suggested that Europe was going to develop a science-based culture that
would be a beacon to most of the world—well, that hardly seemed possible. By
the year 1000, the once-famous Roman Forum had become a pasture for cattle.
Squatters were living in Rome’s Coliseum and hanging laundry from its
windows. Alexandria? You could ask anyone: Its glory days were in the mostly
Pope Sylvester II, who reigned during the millennial year 1000, was sometimes called the Magician Pope, for he was a versatile thinker with many talents.
As a young man,
Sylvester—whose name then was Gerbert of Aurillac—went to Islamic Spain,
where he studied Arabic math and science. While he was there, he read the
ancient Greeks—in Arabic! When he was 39, Gerbert was the star of an all-day
public debate sponsored by the German King Otto II. Scholars and students
traveled from all over Europe for these events. Gerbert argued that physics is
a branch of mathematics, won the debate, and was soon court mathematician and
advisor to the powerful Otto. So, along with a high-powered mind, he now had
He was already a
controversial figure. When he came home from Spain, he told friends and
colleagues about Arabic mathematics and about Greek thinkers. A few other
Christian scholars set off for Spain—although outsiders weren’t welcomed.
They were more likely to bring trouble than anything else. Most Spaniards
thought they had little to learn from other European peoples.
Around 1110, an
English philosopher named Adelard of Bath disguises himself as a Muslim
student and heads for Spain. Adelard has studied and taught in France and
traveled to Italy, Syria, and Palestine. He speaks Arabic, so he has no
problem pretending to be a Muslim. He is anxious to learn all he can in
Spain’s great schools. One of the first books he encounters is Euclid’s
comprehensive treatment of geometry called The Elements.
In a world where
hardly anyone can multiply or divide big numbers, Euclid is astonishing.
Adelard is swept away by The Elements; it makes numbers clear and useful.
Euclid from Arabic into Latin, giving Europe an enormous gift. He helps make
it the most influential book on mathematics ever. (It will be the basis of
almost all thinking about geometry until the 19th century.)
Thanks to the
influential Roman philosopher Boethius, Aristotle’s writings on logic have
been known for centuries. Now, with the Dark Ages receding, his works on
science get translated and begin to be studied by a few Christian scholars. At
the same time, three philosophers from the Arabic world write commentaries on
Aristotle—clarifying and extending his thinking. They are Maimonides, who is
Jewish; Avicenna, who is Persian; and Averroës, who is Spanish. Their
observations give thinkers much to discuss. After centuries of intellectual
stagnation, this is all astonishing. Imagine living in the dark and suddenly
lights are turned on.
Some say much of
the ferment can be traced to the new schools and universities. One of the
first of them is built in the 12th century at Chartres (SHAR-truh), France.
The great cathedral houses a school where professors begin to teach about
nature and science. Universities are soon founded in most large towns across
books to teach, which leads to a demand for scholarly works. Scribes are put
to work copying the new translations of the ancient works. Some scholars
actually begin thinking for themselves. Still, ideas change slowly.
When it comes to
geography, European maps show Earth with three continents: Africa, Europe,
Asia. All the world’s known land—those three continents—is surrounded by
the “Ocean Sea.” That ocean is terrifying because no one has sailed across
it and told the tale; sea monsters are thought to abound.
round world is being taken seriously at most of the universities, but no one
with a ship is dealing with the idea. Around the year 1000, Leif Eriksson, a
Viking explorer, sailed west from Greenland and discovered a new land that he
thought promising for growing grapes. He called it Vinland. But, even a
century later, hardly anyone elsewhere knows of that voyage, and no one
understands its significance.
Grueling, Three-Year “Experiment” at Sea
On September 4, 1522, a battered, worm-infested ship is sighted heading for Seville on Spain’s Guadalquivir (gwah-thuhl-kee-VEER) River. No one has expected it; it is as if a ghost ship has appeared.
crew—a pitiful band of 18 Europeans and four East Indians—are living
skeletons. The 18 Europeans are all that remain of a hopeful expedition of 270
that set sail three years earlier. The families of the men think them dead.
The ship limps
slowly up the river, but word of its appearance spreads rapidly. By September
6, when it reaches Seville, the whole city is consumed with curiosity. Where
has this ship been?
The story begins
on this same river with an armada of five ships. The ships are not
particularly impressive, but the capitán-general is. His name is
Ferdinand Magellan, and he has checked, rechecked, and strengthened every
timber, every sail, every length of rope.
preparing for a two-year expedition. His food supplies include several tons of
pickled pork, almost as much honey, and 200 barrels of anchovies. In case they
must fight, there are thousands of lances, shields, and helmets. To keep the
ships in repair, they pack 40 loads of lumber, pitch, and tar. And there are
mirrors, scissors, colored glass beads, and kerchiefs to trade with unknown
natives. (Later he will discover that he has been cheated; much that he
ordered and paid for is stolen on the docks and not loaded on the ships.)
Some people say
Magellan is a fanatic or, at best, a dreamer. Actually, he is a bit of both,
as achievers must be. Short and muscular with a bushy black beard and a
limp—a battle wound—he has an idea; and it consumes him. He believes he
can do what Columbus has not done—reach Asia and its fabled Moluccas (Spice
Islands) by sailing west. He expects to find the Moluccas, load his ships with
cloves and other spices, and then turn around and sail back, thus pioneering a
new trading route. Spices, especially cloves, nutmeg, mace, cinnamon, and
ginger, are worth their weight in gold and sometimes more than gold.
merchants, adventurers, and scholars, in search of power, wealth, and knowledge,
are trying to find new ways around the world. Magellan is convinced that sailing
west to reach the East will be faster and safer. If he is right, he will become
rich and famous. And if he reaches his destination, he knows it will prove once
and for all that the Earth is a round globe.
The trick will be to
find a passageway through the American land. That land is like a giant jigsaw
puzzle, and most of the pieces are still missing. Like other mariners, Magellan
believes the land Columbus discovered is skinny. Perhaps it is a long island or
He knows that Vasco
Núñez de Balboa climbed a peak in Central America in 1513 and looked out at a
sea. No one realizes that Balboa stood at the narrow waist between two giant
continents—the only place where the Atlantic and Pacific Oceans are relatively
close. No one knows for sure how big Earth actually is. And almost everyone
believes there is only one ocean and that the new land is a minor interruption
in the great Ocean Sea. Magellan studies everything that is known about the
Americas. Besides that, Magellan has brought a slave, Enrique, from the Malay
Islands. Enrique knows the Spice Islands region, and he has a talent for
languages. With him, Magellan is as well prepared to travel to the Spice Islands
as any European in his time could be.
Perhaps you know the
story: of the mutiny and Magellan’s strength in thwarting it. Of the discovery
of a strait at the tip of South America and of the terrors and the tortuous
twists of its waters. (It takes 38 days to get through it.) Of the second
mutiny, when those who sail the largest of the ships turn around and head back
to Spain with most of the expedition’s provisions. Of the awful voyage across
the enormous Pacific—99 days without fresh food. Of Magellan’s leadership
and example during all that harrowing time. And, finally, of the landing on an
island where Enrique talks to the natives and they answer him. He is speaking
that Enrique has arrived home. He is the first man to sail around the world.
Magellan has found the East by sailing west. But the capitán-general doesn’t
have long to celebrate. They are in the Philippine Islands, and Magellan is
about to be killed in a senseless battle.
What does all this
have to do with science? A whole lot: It’s one thing to have a theory. It is
something else to have a proof. Science depends on both.
the Earth was round. Two thousand years later, Magellan proved he was right.
That knowledge electrifies the medieval world. After the surviving sailors
arrive in Seville on Magellan’s worn-out, worm-eaten vessel (the only ship
left from the expedition), couriers (messengers) race across Europe to carry the
news to the pope. Soon, everyone knows of the voyage. Their picture of Earth
changes. They learn that when Magellan and his crew sailed near the
antipodes—what they thought was the bottom of the Earth—they hadn’t been
voyagers had sailed around the globe and had not seen any sea monsters. That was
important knowledge. And then there was Magellan’s discovery of the vastness
of the Pacific Ocean. This was no little sea. If all the Earth’s landmasses
could be dumped into the Pacific, there would still be plenty of water left for
swimming. And Europeans hadn’t even known that ocean existed! Can you imagine
how that knowledge stretched their minds?
There was still
more. The voyage was a great technological feat. When Magellan’s crew arrived
back in Spain, according to Pigafetta, the voyage had covered 81,449 kilometers.
That’s 50,610 miles. Columbus sailed only about 4,100 kilometers (2,548 miles)
on his first voyage. Like the first trip to the Moon, Magellan’s voyage showed
what human intelligence and daring can do. It energized a Western world that,
after 1,000 years of semi-hibernation, was doing more than yawning. It was
getting ready to wake up and run. This new information would help make that
possible. For those who thought scientifically, Magellan changed everything.