• Bizarre inventions from the past
  • Why do we bruise? And why do bruises change color?
  • Earth evolution in 1000 years
  • Homemade pendulum rolling ball clock
  • Amazing magnetic levitation device!
  • Lifting a heavy wheel over your head while it's spinning
  • Wasps build a large nest in a window that can be observed as a cross section
  • Band of flying bots perform a medley of classic songs
  • Chemical reaction - Sulfuric acid + Sugar