From Molecules to Organisms: Structures and Processes
- Chemistry
Trio gets chemistry Nobel for figuring out DNA repair
Three researchers have won the 2015 Nobel Prize in chemistry for working out how cells fix damaged genetic material.
- Psychology
Friends’ good moods can be contagious
Good mental health spreads through teen social networks, but depression doesn’t, a new study finds.
- Animals
Hummingbird tongues may be tiny pumps
Scientists had thought that hummingbird tongues work through capillary action. A new study, though, concludes they work like little pumps.
- Health & Medicine
New treatments may rally ex-president’s fight against cancer
Former President Jimmy Carter has a potentially lethal type of skin cancer that has already spread to his liver and brain. Recent improvements in medicine may help him fight it.
- Health & Medicine
Chikungunya wings its way north — on mosquitoes
A mosquito-borne virus once found only in the tropics has adapted to survive in mosquitoes in cooler places, such as Europe and North America.
- Genetics
DNA: Our ancient ancestors had lots more
Ancestral humans and their extinct relatives had much more DNA than do people today, a new study finds. It mapped genetic differences over time among 125 different human groups.
- Agriculture
Organic food starts to prove its worth
Organic food often comes with a higher price. But research is showing that food grown this way can be better for the environment — and possibly for us.
- Health & Medicine
Explainer: The nico-teen brain
Both e-cigarettes and tobacco products can release large amounts of nicotine during use. Nicotine is the chemical that makes tobacco addictive — and the teen brain is especially vulnerable to it.
- Health & Medicine
Sugar makes mice sleepy
Sugar may amp up sleep-promoting cells in the brain, a new study in mice finds.
- Brain
To protect kids, get the lead out!
Lead poisons hundreds of thousands of children. In Chicago, experts show how the toxic metal hurts test performance in school.
- Genetics
DNA in ivory pinpoints elephant poaching hot spots
Thousands of elephants have been killed for their ivory tusks. A new study used DNA in ivory to trace where most of the killings happen.
- Microbes
Explainer: What is a virus?
Viruses cause many of the world’s common diseases. These germs reproduce by hijacking the cells of their host.
