Time to cash in on a cool way to keep your laptop from overheating. This video from Science Channel shows how to create a heat sink by stacking copper coins on the computer, a tip the host credits to a Japanese Twitter user.
"Copper is more thermally conductive than material most laptops are made of, drawing away heat to cool the machine," the channel's video explains.
But you can't just go grab a bunch of pennies out of your kid's piggy bank.
US pennies were made of pure copper from 1793 to 1837, then varied over the years, according to the US Mint. Since 1982, US pennies have been made of 97.5 percent zinc and 2.5 percent copper-plated zinc, which is no good for this experiment. Look for the pennies from 1962-1981, the video recommends.
IFL Science also points out that US quarters, nickels, and $1 coins also have enough copper to suffice.
We can't vouch for the results, but if you have a couple of bucks worth of coins, why not give it a try?