Designed and crafted by Youtuber B.B.Korry, this hourglass (actually only a 30-second timer) reimagines the classic analog design with a digital upgrade, using magnetic iron filings to count down the seconds as they’re ever so briefly attracted to a digital display before dropping. That’s cool, now make one with enough

This is a video of Youtuber Tom Scott comparing a million dollars to a billion dollars using two-dimensional distance instead of three-dimensional volume. Specifically, how far you’d need to travel to represent a million dollars in single $1 bills resting on their sides in one long stack, each bill being