The Irish mathematician and physicist William Rowan Hamilton, who was born 220 years ago last month, is famous for carving ...

“Imagine that the earth has been watched over the aeons by an extremely patient extraterrestrial observer. Nothing, save a little hydrogen and helium, leaves the planet. And then, less than 20 years ...

Archaeologists discover an intact 2,600-year-old Etruscan tomb containing skeletons, weapons, and more than 100 funerary objects ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Chad Hanna, Penn State (THE CONVERSATION) Scientists first detected ripples in space ...

When two massive objects – like black holes or neutron stars – merge, they warp space and time. Mark Garlick/Science Photo Library Scientists first detected ripples in space known as gravitational ...