Health & Medicine
- Genetics
Explainer: Why scientists sometimes ‘knock out’ genes
How do we learn what a particular molecule does in the body? To find out, scientists often 'knock out' the gene that makes it. Here’s how.
- Brain
Scientists Say: Rabies
Rabies is a disease caused by the rabies virus. There is a vaccine, but without it, people and animals can die from this disease.
- Health & Medicine
Bones have stealth role in muscle, appetite and health
Surprise! Bones release hormones that carry on long-distance chats with the brain and other organs. Studies in mice show these conversations can affect appetite, how the brain uses energy and more.
- Health & Medicine
Explainer: What is a hormone?
Various tissues secrete special chemicals, known as hormones. They travel, usually in blood, to a particular distant site where they tell certain cells it’s time to go to work.
- Brain
Evening screen time can sabotage sleep
Blue light from electronic devices can impair the body’s ability to sleep, making it hard to focus in the morning.
- Earth
Analyze This: Not all races saw equal improvements in this air pollutant
Levels of one U.S. air pollutant, NO2, have dropped over time. But neighborhoods with predominantly non-white residents saw smaller improvements than did those that were mostly white.
- Health & Medicine
Explainer: How the ears work
Most people probably think of their ears as the flaps on the sides of their heads. But there’s a lot of machinery inside that lets us hear our favorite tunes.
- Chemistry
When bitter + bitter = sweet
Two artificial sweeteners lose their bitter aftertastes when combined together. Scientists have just figured out why.
- Health & Medicine
Sweat-slurping ‘aliens’ live on your skin
Archaea are famous for living in extreme environments. Now scientists find they also inhabit skin, where they seem to enjoy sweat.
- Health & Medicine
The power of ‘like’
A single “like” on a social-media post can make it much more popular, which can influence how teens behave.
- Health & Medicine
How bugs in your gut might hijack your emotions
Tiny molecules in the brain may help bugs in the gut hijack people’s emotions. That’s the conclusion of some new research.
- Health & Medicine
Social media: What’s not to like?
Social media can help teens connect with friends and family. Sometimes, however, it may leave them feeling depressed or isolated.
