*adaptation

Steer your boat in the right direction. Sometimes there will be wind, waves, and storms that fight against your voyage, but you must remain strong. With your paddle, your map, and a heart of courage; keep at it. Pursue your adventure.
—  Nicole Addison @thepowerwithin
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With a tail that can be long as its body, the Thresher Shark attacks its prey with violent whip like motions.

This behaviour has been suspected by researchers, but only recently has it been caught on film. The tail is used to stun, maim or even kill the prey, with the shock-wave created by the momentum also stunning surrounding fish.

It is thought to be an evolutionary adaptation as these sharks hunt mainly smaller fish such as sardines. This makes the whip mechanism much more efficient at catching multiple fish with a single blow, as opposed to one fish at a time the shark would tend to catch with its jaws.

The tail was caught moving at up to 80 km/h, spontaneously heating and even boiling small areas of water near the very tip of the tail due to the extreme forces involved. 

Meet the fruit chafer, a prime example of adaptation and speciation. These beetles have evolved from the same basic body plan into an array of different shapes, colors, sizes, patterns, textures, and body structures like horns and spines. Such diversity comes as a result of many different environmental factors.

Although this species of beetle is primarily found in Africa, you can find many different types on display at Carnegie Museum of Natural History.