time travel

A Four-Way Tetrahedral Rack Gearset That Works

This is a video of Youtuber Henry Segerman demonstrating the 'mathematical art' four-way tetrahedral rack gearset he designed and had 3-D printed by Shapeways (you can get...
June 29, 2018

Finally, A Doctor Who TARDIS Cuckoo Clock

Hot on the heels of yesterday's bronze Yoda table lamp comes another gem from The Bradford Exchange -- this Doctor Who TARDIS cuckoo clock. The battery operated...
November 15, 2017