Earth Matters

9 stunning discoveries about Saturn from the Cassini mission

Captivating videos show meteor streaking across Midwest sky

Why rescuing the youth soccer team from a Thai cave wasn't easy or quick

Striking bird photos highlight importance of the Migratory Bird Treaty Act

Heat wave in U.K., Ireland reveals ancient settlements

Why NASA wants to 'touch the sun'

Newly found wasp species has a nightmare of a stinger

7% of Australia's reptiles face extinction

UNESCO selects 19 new breathtaking World Heritage Sites

Big Sur scenic highway to reopen this month after massive landslide

Distant star system proves Einstein right again

The surprisingly lethal price of air-conditioning