If Big Bang theory suggests that the universe started out as a homogeneous mass that spread uniformly in all directions, how did we get 'lumps' [stars, galaxies, etc] in the universe?
- asked by: Mike Myers

Is an error in a measurement caused by parallax, an example of random or systematic uncertainty?
- asked by: Stella Nicolson

Can a laser be used to create a plasma, and can that heated plasma then be used for propulsion? How much energy would a laser need to accomplish this?
- asked by: Derek Fell