I’ve actually known about this little trick since I was a youngun. I’m pretty sure it was the amazing Mr. Wizard that taught it to me, but I’m not 100% on that. Either way, for any of you who have never had the pleasure of watching Mr. Wizard, I highly recommend it.
In fact, I vividly remember doing the string and ice cube experiment, as well as making a potato clock. Honestly, the show is pretty damn neat even for grown folks — it still holds up today, and I don’t think it’s just nostalgia keeping it there.
Via Dave Hax