(youtube) This stone was found near the river "Main" in Germany. I have absolutely no idea why the stone is changing its spinning direction.. Anybody have any idea?
To prove that I didn´t use any magnets, it was put on the glass table.
It looks like a prehistoric tool.
11 months ago • 2,329 views • 1:17
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7 Comments
Sagemindhematite?
critical_dlet's play spin the bottle
grinterhttp://en.wikipedia.org/wiki/Rattleback
grinterhttp://en.wikipedia.org/wiki/Rattleback
messengerAs you can see from the second spin, it just reverses its spin direction, and doesn't seek to return to its original position.
Still super cool and I want one. The explanation for it has earned this sift a *science tag.
siftbotAdding video to channels (Science) - requested by messenger.
siftbotTags for this video have been changed from 'stone, spinning, spins, spin, original position, germany, main river' to 'stone, spinning, spins, spin, original position, germany, main river, rattleback' - edited by RhesusMonk
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