Astronomers have found that part of the MIlky Way known as the thick disk is about 2 billion years older than expected, forming just 0.8 billion years after the Big Bang.
Relativity is one of the most famous scientific theories of the 20th century, but how well does it explain the things we see in our daily lives?
Grizzly bears are a type of brown bear that live in North America.
The disease malaria appears to have influenced blood type prevalence.