The new Argentine dino might give us clues to what the world was like before the asteroid wiped out their kind.

This story appears in the September 2009 issue of National Geographic magazine. First comes the Noise, the turbulent din of king penguins calling, fighting, courting, like the ultimate schoolyard ...

Planet or Plastic? is National Geographic’s multiyear effort to raise awareness about the global plastic trash crisis. Come to this page often to learn more, and find out what you can do to ...