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The Greatest Mystery of Whales The whale is a warm-blooded，air-breathing animal，giving birth to its young alive，sucking themand，like all mammals，originated on land.There are many front flippers，used for steering and stability， are traces of feet.______of this.Its Immense strength is______into the great body of the big whales，and in fact most of a whales body is one gigantic muscle.The blue whales pulling strength has been estimated ______400 horsepower.One specimen was reported to have toweda whaling vessel for seven hours at the______ of eight knot 。 An angry whale will ______ A famous example of this was the fate of Whaler Essex， ______ was sunk off the coast of South America early in the last century. More recently， steel ships have ______their plates buckledin the same way. Sperm whaleswere known to seize the old-time whaleboats in their jaws and crush Them. The greatest ______ of whales is their diving ability.The sperm whale dives to the Bottom for his______ food，the octopus。In that search he is known to go as far Down as 3，200 feet， where the.______ is 1，400 pounds，to a square inch.Doing so he Will ______ underwater long as one hour.Two special skills are involved in this storing up enough______ and tolerating the great change in pressure.Just how he does it scientists have not ______。It is believed that some of the oxygen is stored in a special______ of blood vessels，rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of compensating mechanism that ______ adjusts the internal pressure of his body.But since you cant bring a live whale into the laboratory for study， no one knows just how these things work. | 
