Tina Hesman Saey's Articles
- Peppered moths and some butterflies are icons of evolution. Now scientists have found a gene responsible for making them so.
- The process of turning wolves into dogs, called domestication, may have occurred twice — in the East and the West — ancient DNA suggest.
- A new study finds that a ‘cocktail’ of chemicals in the brain can directly cause mice to fall asleep or waken.
- Scientists rebuilt a microbe using its old genes. But not all of them. They used as few building-blocks as they could get away with and still have the life-form survive.
- DNA from a 50,000-year-old Neandertal woman’s toe bone shows humans left a mark on the ancient species — and much earlier than scientists had thought.
- Since the 1970s, microbiologists have been saying bacteria outnumber human cells in our bodies by about 10-to-1. A new analysis says that old number was a “fake” fact — and gross exaggeration.
- A new genetic technique can render insects that spread malaria unable to reproduce.
- Scientists have recently been reporting big advances in the ability to tweak the genes of living organisms, including people. But some question the ethics of doing that. A panel of experts now says such research can go ahead — with one major exception.
- Scientists showed that a potentially useful new gene-editing tool can work in dogs. It created a pair of adorable, muscular puppies. But the goal is to use it for other research purposes.
- The idea that we eat three meals a day is a myth. People eat nearly constantly, and that may not be good for our health.