Astronomers estimate there could be a trillion planets in our galaxy, yet no confirmed signs of alien civilizations. The talk ...

Titan might be the most hauntingly Earth-like world we’ve ever found — but twisted into something alien. Beneath its thick orange haze are rivers and lakes made of methane, frozen landscapes harder ...

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A soldier returned from the Sahara desert in 1916 with a wild story about a meteorite that dwarfed all others. Over 100 years of hunting yielded nothing – but now twin brothers think they have solved ...