The pioneering work of physicist Stephen Hawking is honored in a Google Doodle today (Jan. 8).
Cannabis has long been called "skunky." Turns out, stinky sulfurous compounds are to blame.
Here's what it's like inside a kangaroo's pouch, where joeys can live for up to one year.
Astronomers have discovered a cloud of atomic hydrogen more than 3,900 light-years long, known as "Maggie," in the Milky Way.