Obstacles for students.

Obstacles for students.

Last summer fans поплескаться in the sea ocean, intimidated by constantly appearing messages on the next victim of blood-thirsty sharks, got over to safe pools.
But, seemingly, the Australian scientists found panacea from a misfortune. They created the device which is frightening off sharks. The small device fastens on an ankle of the swimmer and surrounds it with electric field which influences nervous system of dangerous fish. Having swum up to the person on distance in 2 — 3 meters, toothy feels intolerable pain and fast retires.
Australians promise that there will be the similar device soon, allowing to protect from predators the whole beaches.
And "peaceful" inhabitants of the sea will not suffer from it.

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