Astronomers have identified a strange new kind of exoplanet that challenges how scientists classify worlds beyond our Solar System. The planet, L 98-59 d, appears to contain a vast ocean of molten ...

Could ancient humans really have built the pyramids without extraterrestrial help? Or do such questions reveal more about modern anxieties than the past itself?

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Diamonds are famous for their strength, but scientists have long suspected that another form of diamond might be even harder.

Debunking alien claims matters, but so does telling richer, more compelling stories about how humans shaped their own past.