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A comet recorded by the Aztecs appears to have foreshadowed the arrival of the Spanish conquerors.

A gigantic number of viruses are constantly circulating around the Earth in the lower layers of the Earth's atmosphere.

Our planet's history includes at least several hundred global magnetic reversals, in which the north and south magnetic poles have swapped places.

According to records, Greek Fire was fire developed in 672, but the formula remained a closely guarded military secret.

This is one of the oldest known records of a child born in ancient Sumer.

Researchers have developed a simulator that can feed information directly into a person's brain and teach them new skills in a short period of time, like in the classic science fiction movie "The Matrix."

Chinese archaeologists have discovered the remains of "giants" who lived about 5,000 years ago and their bone structure shows they were unusually tall and strong.

The biohybrid robot is half electronic and half organic, and could be the first step towards something bigger.