2,456 results
2,456 results for: mutations
- Health & Medicine
What’s missing may be key to understanding genetics of autism
A large study of people with the developmental disorder reveals the importance of extremely rare variations in genes, making each case a bit different.
- Health & Medicine
Sickle-cell anemia tied to cognitive impairment
Patients with the hereditary condition score worse on standardized tests than people without it.
- Life
Undereducated immune cells get aggressive with HIV
Scientists discover a mechanism that makes some people resistant to infection with the AIDS virus.
- Animals
Aphids make their own bright colors
The insects’ ancestors adapted fungal DNA for manufacturing vital compounds.
- Life
DNA comparison of identical twins finds no silver bullet for MS
The first study of its kind suggests an unknown environmental cause for multiple sclerosis, but future research could still yield a genetic trigger.
- Anthropology
Lice hang ancient date on first clothes
Genetic analysis puts garment origin at 190,000 years ago.
- Health & Medicine
Colorectal cancer risk linked to stomach bacterium, inflammation
Stomach infection and high levels of inflammatory proteins are more common in people with colon polyps or disease, two studies show.
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18938
In grad school, I read and learned from Ernst Mayr’s Populations, Species, and Evolution (1963, 1970, Harvard University Press). I think that “Alarming butterflies and go-getter fish” extremely simplifies Mayr’s position on speciation. The article says that Mayr focuses solely on geographic separation, “allopathic speciation.” This ignores the fact that Mayr discussed a variety of […]
- 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, […]
- Plants
Dastardly daisies
This flower isn’t just any old sex cheat. It can be sexually deceptive three ways and in 3-D.
- Humans
Letters from the May 6, 2006, issue of Science News
Same old grind “Ancient Andean Maize Makers: Finds push back farming, trade in highland Peru” (SN: 3/4/06, p. 132) remarks on maize starch granules being “consistent with” stone grinding. The presence of lowland arrowroot on one tool is consistent with trade, but it is equally consistent with a wandering hunter grabbing a root in the […]
- Neuroscience
Narcolepsy may be an autoimmune disease
Narcolepsy occurs when wayward immune forces launch an attack on brain cells responsible for wakefulness, a new study suggests.
