Where do meteorites of different type come from? In a review paper, astronomers trace the impact orbit of observed meteorite falls to several previously unidentified source regions in the asteroid ...

Cross Pennsylvania Avenue NW and then Constitution Avenue NW. On the south side of Constitution, you can stroll through the Sculpture Garden outside the National Gallery of Art at the start of your ...

Around 14,500 years ago, toward the end of the last ice age, melting continental ice sheets drove a sudden and cataclysmic ...

A hidden ecosystem of giant sea spiders, octopuses, and other stunning sea creatures shows how life can flourish even when sealed off from the surface by a thick layer of ice.