Why the US hasn't returned humans to the moon. The reasons are depressing.
The last time a human visited the moon was in December 1972 during NASA's Apollo 17 mission. Since then, there have been many ...
Twisted Sifter on MSN17h
New Study Hypothesizes That Mars Once Had A Moon, Which Disappeared After Causing Its Odd Shape And Geological Features
Mars is an interesting planet with many unexpected features. For one, it is not a sphere, but rather what is called a ...