by Jason Stotts
Did you ever wonder how what is essentially a balloon full of blood becomes erect and hard enough to penetrate tight spaces and resist lots of pressure? Now you can find out in this fascinating TED talk.
by Jason Stotts
Did you ever wonder how what is essentially a balloon full of blood becomes erect and hard enough to penetrate tight spaces and resist lots of pressure? Now you can find out in this fascinating TED talk.