2,475 results
2,475 results for: mutations
- Life
Tiny human almost-brains made in lab
Stem cells arrange themselves into a version of the most complex human organ.
- Life
Many genes in dolphins and bats evolved in the same way to allow echolocation
Widespread changes scattered across the genomes of distantly related species cooperated to craft the trait.
- Animals
Tiger, lion and domestic cat genes not so different
Genomes of big felines provide insight into their evolution.
- Health & Medicine
MERS outbreak picks up pace in Middle East
As the number of MERS cases increases, researchers race to learn more about the deadly virus carried by camels.
- Climate
Environmental change may spur growth of ‘rock snot’
A controversial new theory suggests alga that forms rock snot isn’t an invader, but a low-key species native to many rivers.
- Humans
Letters from the October 20, 2007, issue of Science News
Well, read Margit L. Bleecker appears to have discovered that those who score highly on reading tests also score highly on tests of memory, attention, and concentration (“How reading may protect the brain,” SN: 8/18/07, p. 110). I don’t find that highly surprising. Ivan MannHoover, Ala. How it happened stance “Alien Pizza, Anyone?” (SN: 8/18/07, […]
- Genetics
Chimp and human lineages may have split twice as long ago as thought
New estimates of chimpanzee mutation rates suggest humans and chimps last shared a common ancestor 13 million years ago.
- Health & Medicine
Ulcer microbe changes quickly to avoid immune attack
During the initial weeks of infection, Helicobacter pylori, the bacterium that causes stomach ulcers, mutates at a high rate, apparently to evade the body’s defenses.
- Life
HIV hides in growth-promoting genes
The discovery that HIV can trigger infected cells to divide means scientists may need to rethink strategies for treating the virus that causes AIDS.
- Neuroscience
Alzheimer’s disease may come in distinct forms
Mouse experiments, if confirmed in people, imply that Alzheimer’s disease treatment should be personalized.
- Life
Tibetans live high life thanks to extinct human relatives
DNA shared by modern-day Tibetans and extinct Denisovans suggests people picked up helpful genes through interbreeding with other hominids.
- Plants
Wine corks may owe quality to gene activity
Discovery of genes that distinguish superior stoppers from inferior ones could help reverse recent global downturn in quality.
