After decades of study, scientists sound genuinely optimistic about the possibility of detecting primordial black holes, which might explain dark matter.

Samples from NASA’s OSIRIS-REx mission show the asteroid Bennu had organic molecules and minerals and possibly salty water and other life ingredients.

A recent flurry of executive orders and surprise actions by the Trump administration have roiled WHO, the CDC and the international public health community.

Casarabe people grew the nutritious crop year-round on savannas thanks to networks of drainage canals and ponds.