What, or when, would aliens see, if they looked at the earth?
Answers to Space Science Questions
Answers to questions about space science, astronomy, rockets, planets, galaxies, stars...
14 February 2010
Is it possible to make a phone call from a black hole?
07 February 2010
Have the seasons ever shifted? Assuming we could follow our own calendar back millions of years, would northern...
29 November 2009
15 November 2009
Were the red sands of Mars caused by biological activities because when the levels of oxygen rose on Earth billions of...
01 November 2009
06 September 2009