Facts i m sure You don't know abut these...

• Horseshoe crabs have eyes on their tail.
  

• Velociraptors were just slightly bigger than chickens.
  

• Penguins will give their mate a pebble as a way of proposing.
  

• A pencil has the potential to draw a line 38 miles long.
  

• The largest air force in the world is the US Air Force. The second largest air force in the world is the US Navy.
  

Upvote, resteem and Follow for more facts you don't know.