The analog digital clock
Okay, "world's coolest" may be a bit of a stretch (that title still goes to NIST's F1 atomic clock in Boulder, Colorado), but what Inga Sempe has created might fall just shy of it. It's analog and digital, with the hour and minutes hand rotating as would a normal clock, but at the end of the clock is a digital readout which independently orients itself so it's always readable (we suspect some weight or gyroscope action just like the taxi hubcap ads). Unfortunately, this clock is a one of a kind (and how), so expect to see some crappy Hong Kong-knockoff on eBay any day now.
