The study of human evolution is a young science with a history that can be traced back to the late 18th century. But it wasn’t until Charles Darwin’s On the Origin of Species in 1859 that the theory of evolution took hold. In the 150 years since Darwin’s book was published, our understanding of human …
Many countries have an abundance of lakes, but which one has the most? With over 563 lakes, Canada has more lakes than any other country. In fact, lakes make up about 9% of Canada’s total surface area. The Great Lakes, which are shared between Canada and the United States, make up the largest group of …
Most of Earth’s water is in the oceans. But where did Earth’s water come from? Some of it came from inside the planet. When Earth formed 4.6 billion years ago, it was a hot, molten blob. As it cooled, water vapor escaped from the interior and condensed in the atmosphere. But the oceans hold much …
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Eratosthenes of Cyrene (/ˌɛrətɒsˈθiːniːz/; Ancient Greek: Ἐρατοσθένης ὁ Κυρηναῖος, romanized: Eratosthénēs ho Kyrēnaîos; c. 276 BC – c. 194 BC) was a Greek mathematician, the first geographer, and astronomer. He is credited with being the first person to calculate the circumference of the Earth, which he did by applying a measuring system using stadia, a …
What is the Amazon River? The Amazon River is a river in South America that flows from the Andes Mountains to the Atlantic Ocean. It is the longest river in the world and one of the most important rivers in the Amazon rainforest. The Amazon River is home to many different species of animals and …
The oceans are thought to have started forming around 4.4 billion years ago, give or take a couple of hundred million years. At that time, the Earth was a very different place from what it is today. It was much hotter, for one thing, and it was also being bombarded by huge chunks of rock …
7 Seas and 5 Oceans term history The term “Seven Seas” comes from ancient times, when people believed there were only seven oceans on Earth. The exact origin of the phrase is unknown, but it is thought to be derived from ancient Greek or Roman sailing lore. The term Seven Seas has been used in …