Do you what is the biggest animal in our planet? It is whale. Whales are the biggest animal that has been found so far on our planet. They have an enormous size of body, also they are very heavy. They can grow up to 100 feet in length and its fin can grow up to 88 fits.

There are some unique facts about whales which are not known for us. Whales can sleep. When whales sleep, they only put one-half of their brain to rest. It is very odd to know that whales can sleep. They sleep with a half brain so that they still can take a deep breath to the surface.

Don’t forget that whales are mammals that need air to breathe. Also, they do that to keep alert for dangerous around them. Whales have a sense to hear, just like us, a human being. They can hear sound clear enough. It is known that whales have an excellent hearing ability.

Just like in the article, best automatic cat litter box reviews, kitties listen to you when you ask them to use box, but whales have better hearing than kitty to listen slightest sound. Whales also have a very long life span. Have you ever guessed? Bowhead, one of popular species from whales, can be lived for over 200 years, compared to human than can only live for 112 years.

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