Fun Facts

• There are more than 5,400 species of mammals living today!
  
  
• Batodonoides is the smallest mammal that ever lived. It weighed as much as a dollar bill.
  
  
• The blue whale is the largest animal—mammal or otherwise—ever known. It can grow to nearly 200 tons (400,000 pounds)!
  
  
• Humans are extreme in many ways: large brains, upright locomotion, and sparse body hair.
  
  
• The placid-looking male platypus has a secret weapon: spurs on its hindfeet that deliver toxic venom!
  
  
• Koalas are not bears. They're marsupials and are more closely related to kangaroos.