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Comment Re:A very unusual toad (Score 3, Interesting) 121

Not strictly true.
The dense vegetation makes it implausible for the frogs to communicate by hand signals alone. Rather it is thought they use a mix of body language and ultrasonic sound over a short distance in order to communicate.
The Ultrasonic part is only a guess as the middle part of the frogs ear is not air-filled, and the inner part of the ear does not seem to be connected to any outer surface of the frog. This can be tested, but the scientists can't exactly vivisect a critically-endangered animal, so they have to guess.

Comment Re:magnets [on auto wheels?] (Score 1) 112

Something like that is actually used in hybrid vehicles to regenerate the battery. it's called Regenerative Braking. Using it like you suggest would be like driving with the handbrake on. Also remember that recapturing energy like this is very inefficient, therefore you are better off generating electricity directly from the engine.

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