How many planets are there in our solar system? Nine? Eight? Twelve? Hundreds? I know many will insist there are nine, with Pluto as the ninth planet, but ...

You might want to solve today's puzzle before reading further! Carpe Diem (Freestyle) Constructor: Dena R. Witkes Editor: Amanda RafkinStart the day smarter. Get all the news ...

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 ...