Posted 13 years ago by PESTO in category: sports   Comments (2)


Ramesh Raskar
Posted 11 years ago by boyt in category: interesting   Comments (0)



Posted 10 years ago by GaryJohn in category: misc   Comments (1)


A tennis ball is placed in a tube with vacuum. When exposed to air, the ball is accelerated by the atmospheric pressure.
Posted 9 years ago by pancho in category: science   Comments (0)