What, or when, would aliens see, if they looked at the earth?
Answers to Physics Questions
Physics, cosmology, astrophysics, electricity, energy, forces, gravity, light and maths...
13 April 2008
How much air does the average car hold? If it were perfectly sealed, how long could you keep driving for without...
25 February 2008
10 February 2008
How do Electric Eels avoid shocking themselves?
10 February 2008
03 February 2008
How is oxygen made and recycled on the International Space Station?
27 January 2008
Could a plane take off on a 'treadmill' runway?