The oarfish, Regalecus glesne, is the longest bony fish in the world. With its snakelike body, sporting a magnificent red fin along its 50-foot length horselike face and blue gills, it accounts for many sea-serpent sightings

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The male of one species of insect related to the praying mantis can only reproduce after the female has bitten off his head.

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When the pack kills an animal, the alpha pair always eats first. As food supply is often irregular for wolves, they will eat up to 1/5th of their own body weight at a time to make up for days of missed food.

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A huge underground river runs underneath the Nile, with six times more water than the river above.

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Total fertility rate of the world is 2.59 children born/woman.

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Elephants are the largest land-living mammal in the world.

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The 236 ft or 72 m high Ada Tree of Australia has a 50 ft or 15.4 m girth and a root system that takes up more than an acre.

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A typical Mayfly only lives one day.

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Tree roots stabilize soil and prevent erosion.

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Secondary roots grow from the primary root.

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