Space around Earth is filling with discarded hardware, shattered fragments and derelict satellites just as governments and companies race to launch thousands more spacecraft. The risk is no longer ...

What is a hermit crab? There are over 800 species of hermit crabs worldwide, and almost all are ocean dwellers—though people are likely most familiar with the dozen semi-terrestrial species, called ...

The continent’s ice is melting and raising sea levels worldwide. Our journalists will be sending regular dispatches as they head there with scientists trying to gauge the dangers. By Raymond Zhong and ...