News Summary

• A YouTube channel built a bicycle based on a drawing in Leonardo DaVinci’s sketchbook.
• The bike has both pedals and brakes, both of them using drawings from the Old Master's book.
• The chain is a weak point of the design; they’d likely have been better off with a leather belt, or perhaps a stack of gears as we’ve seen before.
• Still, this is recognizably a bicycle and entertaining content for anyone who plans on violating the temporal prime directive or wants to get around after the apocalypse.