Dark matter seems invisible, but it makes up most matter, and we have evidence that it gives the cosmos its shape. Now ...

Nitrogen, upon which all life on Earth depends, may hold the key for explaining how early life on the planet evolved and how it could evolve on other planets.

"It really should be something that governments pour effort into, like the Manhattan Project." Scientists spark backlash with first-of-its-kind ocean experiment: 'It's going to be the largest thing ...