Science: Moon Markings

As seen through a big telescope rather than by young lovers, the moon resembles a shell-battered World War I battleground. Clusters of craters are scattered across the satellite's cracked, rugged face like smallpox scars. Many are ringed by mountains up to 20,000 ft. high; some are more than 100 miles across and four miles deep. What caused these lunar markings? Astronomers advance two theories: the craters are 1) the shells of extinct volcanos, or 2) the result of meteorite bombardments some 4 billion years ago.

A radically new explanation is now offered by one...

Want the full story?

Subscribe Now


Get TIME the way you want it

  • One Week Digital Pass — $4.99
  • Monthly Pay-As-You-Go DIGITAL ACCESS$2.99
  • One Year ALL ACCESSJust $30!   Best Deal!
    Print Magazine + Digital Edition + Subscriber-only Content on

Learn more about the benefits of being a TIME subscriber

If you are already a subscriber sign up — registration is free!