Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people

— Carl Sagan

Earth atmosphere heated by another souce...

By myamiphil at Sun, 09/27/2009 - 12:24pm

A surprise in the upper atmoshere of the Earth
 
Another way of heating the earths atmosphere has been found... THis one is not due to the sun's heating of the earth by sunlight.