Did you know...? Funny, curious and useful FACTS#1

I am starting a series of posts presenting some curious facts about our world. Things you might already know or you might never thought of. It is very nice to learn something new everyday despite of it being useful or not. I collect the facts from all over the internet and books I've read. Hope you enjoy the first part. And stay tuned for my next posts including some interesting facts.

• The cockroaches can live for 10 days without a head before they die of starvation.

• Snails can sleep for three years.

• American Airlines saved $ 40,000 in 1987 by putting one olive oil less in salads served in the first class.

• The ostrich eye is bigger than its brain.

• Babies are born without knee caps. They develop after the child's second year.

• When hitting your head in the wall 150 calories per hour are consumed.

• The butterflies taste with their feet.

• The comics with Donald Duck were forbidden in Finland because he does not wear pants.

• People and dolphins are the only species that have sex for pleasure.

• If Barbie was real in size, her measures would have been 39-23-33. She would be 2.20 meters high and her neck would be
  twice as long as the human's.

• If you hold a goldfish in a dark room she will become white.

• Leonardo Da Vinci invented the scissors.

Did you know some of these facts and which one surprised you most? Please share in a comment.