There's a lot more to Earth than meets the eye. Far from being just a roundish rock barreling through space, our planet is composed of several layers held together by intense forces of gravity. Our ...

Earth Day is on Tuesday, April 22, this year. The annual observation is set aside to increase awareness around environmental issues like climate change, pollution, endangered species and other global ...

Earth Day began in 1970 and takes place on April 22 every year. Here are 10 questions to test your knowledge of the planet. 1. A day on Earth is 24 hours but it always hasn’t been that way. Are the ...

CAPE CANAVERAL, Fla. — A spacecraft blasted off Monday to investigate the scene of a cosmic crash. The European Space Agency’s Hera spacecraft rocketed away on a two-year journey to the small, ...