Archives: September2009

• Ardi’s Secret: Did Early Humans Start Walking for Sex?

  Why don’t women know when they’re ovulating? Why don’t men have clacker-sized testicles? The world’s oldest known “human” skeleton—”Ardi”—may hold clues.

  
  
  
  
  
  
  
  
  
  

• Quakes Rock Pacific Islands

  A second earthquake shook western Indonesia Thursday as the death toll rose above 500 from Wednesday’s powerful quake. Plus, see a computer simulation of Tuesday’s Samoan quake and the resulting tsunami waves. Video.

  
  
  
  
  
  
  
  
  
  

• “Supervolcano” With Twisted Innards Found in Italy

  About 280 million years ago a “supervolcano” eruption rocked Italy and may have triggered prolonged global cooling, say scientists who found the volcano and its unusual insides.