2,456 results
2,456 results for: mutations
- Neuroscience
Finding the brain’s common language
Erich Jarvis dreams of creating a talking chimpanzee. If his theories on language are right, that just might happen one day.
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Letters
Redesigning flu mortality In “Designer flu” (SN: 6/2/12, p. 20), researcher Michael Osterholmis quoted as saying that even if the actual kill rate of H5N1 is 20 times lower than the current estimate of 59 percent, H5N1 would still have a mortality rate that “far exceeds” that of the 1918 flu. Wikipedia gives a 1918 […]
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Letters
Bull’s-eye targeted On the picture in “Galactic bull’s-eye” (SN: 9/24/11, p. 10), I am quite puzzled. Do my eyes deceive me, or is there another bull’s-eye galaxy behind the first, located at the 1 o’clock position? How is this possible? Are these strange objects magically clustered along some line pointing towards us? Jeff Brewer, Newton […]
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Letters
The liver’s carbon fixation The possibility that insects can harness solar energy (SN: 1/15/11, p. 8) is no less fascinating than the ability of the mammalian liver to do the light-independent part of photosynthesis: carbon fixation. When concentrations of the amino acid methionine rise after a high-protein meal, the liver shifts gears to get rid […]
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Letters
Don’t dismiss Lamarck Your January 31 special birthday edition on Darwin (SN: 1/31/09, p. 17) was excellent, but I believe that science has allowed Jean-Baptiste Lamarck’s contributions to be overshadowed by Darwin’s. The change that can occur to an organism’s genetic makeup during its own lifetime harks away from Darwin’s slow evolutionary process by chance […]
- Humans
From the February 5, 1938, issue
Tiny shells test lenses, the rules of radioactivity, and discovering new lunar terrain.
- Humans
From the November 26, 1932, issue
BOYS WORSE OFFENDERS To aid the harassed parents of temperish youngsters, Dr. Florence L. Goodenough of the Institute of Child Welfare, University of Minnesota, has made a scientific study of anger in young children–what are the immediate causes of outbursts, what are the underlying causes, what methods are commonly used to suppress it, and what […]
- Animals
Tiger, lion and domestic cat genes not so different
Genomes of big felines provide insight into their evolution.
- 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.
- Life
Tiny human almost-brains made in lab
Stem cells arrange themselves into a version of the most complex human organ.
