Humans need less sleep than other mammals, yet their slumber is more efficient, said researchers at Duke University in North Carolina.
Technology company Google has brought reliable Internet connections to Kampala, Uganda.
University of Washington researchers say they used a laser to turn hot water into cool water.
Prince Charles says he has been talking about climate change at global conventions and conferences for 20 years.
Terrorist attacks in Paris are not expected to stop the United Nations from hosting a major climate conference in that city.
One of the big changes is that cars will drive themselves.
Space. It’s called… the final frontier.
Uganda is experiencing some of its most unpredictable weather in 20 years.
Most people are born with two sets of teeth.
Reducing some climate pollutants could save millions of lives, says a new report by the World Health Organization (WHO).