He began to suspect that our solar system’s history had been anything but smooth—that it had somehow endured a “global gravitational instability,” as he now calls it. In 2004 he gathered ...

Discover the fascinating findings from asteroid Bennu: pristine salt minerals reveal the presence of liquid water in the ...

Discover how a giant interstellar cloud known as the solar nebula gave birth to our solar system and everything in it. The solar system as we know it began life as a vast, swirling cloud of gas and ...