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It may look like just another random boulder, but this old Spanish rock bears engraved lines that could be an astounding 200,000 years old, according to government officials.

The age of the lines and how they were formed still needs to be…

Stardust’s prospective clients seem to be governments: As countries consider geoengineering, Stardust could be poised to sell them tools to meet those goals, several experts said. In an emailed answer to questions about its business model,…

For centuries, scientists believed that only the elite were buried in pyramids. But a surprising recent discovery of ancient skeletons has thrown that idea into question. 

In a new study, researchers analysed the remains of people buried in…