There are more than 450 artificial caves excavated from sandstone beneath the streets and buildings of Nottingham, England—including, legendarily, the old dungeon that once held Robin Hood. Not all of these caves are known even today, let alone mapped or studied.
The labyrinthine complex of caves under the city of Nottingham certainly has history, from giving passage to sieging soldiers in the 1300s to housing an underground butcher centuries later. Now it's all been mapped, thanks to a thorough 3D laser scan.
What do you get when you mix a frizzy-haired, grandfatherly chemist with his younger, cackling, explosion-loving sidekick? The Periodic Table of Videos! Put together by a team at the University of Nottingham in the UK, this gargantuan effort of 118 short vids chronicled everything from Hydrogen (very explosive) to…