Europeans’ ability to digest dairy after infancy evolved just 7,500 years ago, spreading out from central Europe — not northern Europe, as previously believed — across the continent and into western Asia.
genes
All humans are mutants, a new study suggests
Researchers in Britain and China are using a new method to measure the rate of genetic mutation among humans — and it seems that all people in the world likely carry at least some new mutations.
For their study, published this week in the journal Current Biology, the researchers enlisted the help of two Chinese men whose families …
Why do some people need less sleep? It’s in our genes, new research suggests
Some people are genetically programmed to need less sleep than the rest of us, according to a new paper published this week in Science. A rare genetic mutation lets its carriers function happily and healthily even with hours less sleep each night than doctors normally recommend.
Researchers discovered the enviable gene variant …
A treatment for blindness reveals the incredible plasticity of the brain
Recently doctors began gene-therapy trials to treat Leber’s congenital amaurosis, a common cause of blindness in babies and children. Now, a group of doctors reports that they’ve found an unexpected benefit of the gene therapy. After treatment, vision may continue to improve with time — because the brain can re-wire itself to better …
Do redheads really feel more pain? The jury’s still out
You may have seen the recent (and well–publicized) study that shows redheads are more scared of the dentist than other people are. The idea is that the same gene variant that leads to red hair also — for some reason — makes people more susceptible to pain, and less receptive to the common anesthetics that a dentist might use before …
Researchers find a new Alzheimer’s gene
Scientists from University of California, Irvine, have found a new genetic risk factor for Alzheimer’s disease. In a study of 381 people, those with Alzheimer’s were nearly twice as likely as people without the disease to have a certain form of a gene,TOMM40 (which stands for “translocase of outer mitochondrial membrane 40”). Although …
The Roots of Individuality
Why do different people’s minds work so differently? Human brain cells don’t follow a set DNA script. Instead, they contain a surprising number of mobile elements — or “jumping genes” — that let them reorganize their genetic code.