Mars is smaller and less geologically active than Earth.
Internet dating is very popular in the U.S.
Plastics can remain in the environment for hundreds of years.
It is just one step to smarter clothing.
Facebook removes material that violates the rules.
The single fossil finger bone of Homo sapiens.
It is impossible for farmers to keep up with the activities of each cow individually.
A group of scientists in Israel are researching how to help paralyzed people walk again.
He opened the conference by linking scientific progress to Africa’s development at large.
The search for worlds orbiting distant stars will intensify in the coming weeks when the American space agency NASA launches a spacecraft.