How Geometry Helps Human Towers Defy Gravity | BBC Earth Science

Hundreds of people can build a nine-story human tower without it collapsing under its own weight. This BBC Earth Science clip looks at the physics behind Catalonia's castells, focusing on how geometry and weight distribution help the structure stay upright. The clip is taken from the 2016 series Forces of Nature.

• Explains how geometry and weight distribution keep human towers stable
• Focuses on Catalonia's castells and the physics of gravity
• Clip from the 2016 BBC series Forces of Nature

How do hundreds of people build a nine-story tower without collapsing under tons of downward force? Discover the physics behind how Catalonia's remarkable human towers defy gravity. This clip is from Forces of Nature (2016) #Physics #Science #Gravity #Engineering #Geometry #Castells #HumanTowers Best of Earth Science: http://bit.ly/EarthLabOriginals Best of BBC Earth: http://bit.ly/TheBestOfBBCEarthVideos This is a channel from BBC Studios who help fund new BBC programmes. Service information and feedback: http://bbcworldwide.com/vod-feedback--contact-details.aspx