The golden age of Islam The Abbasid caliphs established the city of Baghdad in 762 CE. It became a center of learning and the hub of w...

One frequent question I get is whether we can break the light barrier—because unless we can break the light barrier, the distant stars wil...

What Is a Black Hole? A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is...

Hawking radiation (sometimes also called Bekenstein-Hawking radiation) is a theoretical prediction from British physicist Stephen Hawking...

Momentum  is the quantity of motion of a moving body. In a basic sense, the more momentum a moving object has, the harder it is to st...

Neutron stars can spin at a rate of 600 rotations per second. Neutron stars are one of the possible evolutionary end-points of high ma...

Date: March 22, 2017 Source: University of Helsinki Summary: Of all pets, cats are often considered the most difficult ones to medica...