Study suggests aliens could attack Earth to save the galaxy
While extreme weather fluctuations and rising sea levels are well-known effects of climate change, a bizarre new study suggests another reason to be wary of the perils of global warming: an alien invasion.
Top 10 Earth photos from the ISS
The Crew Earth Observations Team shares their "Top Ten" Crew Earth Observations
Hubble finds ring of dark matter
Astronomers feel that this discovery is the most conclusive proof so far that the mysterious substance known as dark matter exists.