Memorizing seven continents feels settled, like learning the alphabet. A new study argues the ground rules are less tidy. The ...

The largest domestic quake of the year occurred on July 16 centered south of the Alaska Peninsula, 53 miles south of the ...

Narrator: Four and a half billion years ago, clouds of cosmic dust and gas which were orbiting the Sun collided into one another, creating the Earth, our planet, the home of mankind. It spins at 1000 ...