Archives: July2009

• Big “Transsexual” Fish in Peril

  A favorite of divers in Australia, the blue groper grows to about three feet (one meter) long and can change its own sex. But its numbers are diving, and researchers are trying to throw the groper a lifeline. Video.

  
  
  
  
  
  
  
  
  

• Dark Matter Helped Early Galaxies Survive “Massacre”

  Large enough clouds of the mysterious substance helped young galaxies survive the radiation of the universe’s first stars, a new model suggests.

  
  
  
  
  
  
  
  
  

• More Rhinos Hacked Apart as Horn Demand Spikes

  Bloody and incomplete, their horns hacked away by poachers, rhinoceros carcasses are appearing in greater numbers, due to growing Asian demand and international trade, groups say.