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Strange Stone Keeps Returning to Original Position When Spun

submitted by pumkinandstorm

1 decade 1 year 10 months ago

(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.

7 Comments

hematite?

let's play spin the bottle

http://en.wikipedia.org/wiki/Rattleback

http://en.wikipedia.org/wiki/Rattleback

As 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.

Adding video to channels (Science) - requested by messenger.

Tags 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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