A megastructure found in the Baltic Sea may represent one of the oldest known hunting structures used in the Stone Age — and could change what’s known about how hunter-gatherers lived around 11,000 ...

A vast, geometric feature buried beneath the Pacific Ocean is forcing scientists to rethink what they know about Earth’s deep past. Early mapping suggests a colossal, plateau-like structure near ...

Scientists have found a giant wall underneath the Baltic Sea — and they’re pretty sure humans made it. In a new paper published in the Proceedings of the National Academy of Sciences, the German ...

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Lurking some nine billion light years away from Earth is what appears to be a so-called cosmic megastructure in the shape of an enormous ring. It’s so large that its existence should be impossible, ...

Following is a transcript of the video. Narrator: In 2015, astronomers noticed something ...strange going on nearly 1,500 light-years from home. A star named KIC 8462852, aka Tabby's Star, kept ...