Facts you will never know

 

• A dragonfly has a lifespan of 24 hours.
• A fully loaded supertanker travelling at normal speed takes a least twenty minutes to stop.
• A giraffe can clean its ears with its 21-inch tongue.
• A giraffe can go without water longer than a camel can.
• A goldfish has a memory span of three seconds.
• A hard working adult sweats up to 4 gallons per day. Most of the sweat evaporates before a person realizes it's there.
• A hedgehog's heart beats 300 times a minute on average.
• A hippo can open its mouth wide enough to fit a 4 foot tall child inside.
• A hummingbird weighs less than a penny.
• A jellyfish is 95 percent water.