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Posted 13 years ago by treetop in category: science   Comments (3)


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A simple method to test any alkaline battery in seconds.
Posted 10 years ago by anri1 in category: science   Comments (0)


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For a brighter and cleaner future
Posted 10 years ago by Torres457 in category: science   Comments (12)



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A team of six µTug microrobots weighing 100 grams pulling the author's unmodified 3900lb (1800kg) car on polished concrete.
Posted 8 years ago by urdone in category: science   Comments (0)


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Scientists shot a long copper wire into a lightning-prone cloud using a small rocket. The generated lightning followed the wire down to the ground, allowing the researchers to record the sound waves of the resulting thunder. The green flashes are caused by the intense heating of the copper wire.
Posted 9 years ago by SandraN in category: science   Comments (0)