Earth Day brings everything from special Google Doodles and beautiful views of our planet to the historic signing of an international climate agreement.
No wonder we don't feel rested after a first night in a new place: Half of our brain has stayed alert while the other half enjoyed deeper sleep, a study finds. We really havebeen half-asleep.
The two nations topping the world in greenhouse gas emissions agreed at the Paris talks to cut way back. But critics have stalled a key part of the U.S. plan, and China's good start may be fragile.
Solar Impulse 2 is attempting to circumnavigate the world using only the sun's power. It has been grounded in Hawaii for maintenance and is now on a three day journey heading to California.
Researchers say climate change has made weather more pleasant in many parts of the U.S. Winters have been milder, and summers haven't become much hotter. But that's likely to change in coming years.
Suicide, drug abuse and alcohol have started to shorten the lives of white women, a U.S. report on data from 2013 to 2014 suggests. Life-expectancy for many black men went up from 71.8 years to 72.2.
The National Institutes of Health shut down some clinical trials and two production facilities over concerns that safety rules haven't been followed, but it says no patients appear to have been hurt.
Scientists measured the microbes that are in the indoor spaces where we spend most of our time. Each city had a unique microbiome, with many outdoor microbes making their way indoors to live with us.
Human beings would be better at fighting climate change if we weren't so, well, human. In this episode, we explore the psychological barriers to addressing climate change.