2,448 results
2,448 results for: mutations
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Cavefish blinded by gene expression
New evidence supports the theory that Mexican blind cavefish are sightless by evolutionary selection, not chance.
- Anthropology
Evolution’s Lost Bite: Gene change tied to ancestral brain gains
In a controversial new report, a research team proposes that an inactivating gene mutation unique to people emerged around 2.4 million years ago and, by decreasing the size of jaw muscles, set the stage for brain expansion in our direct ancestors.
- Anthropology
‘Y guy’ steps into human-evolution debate
The common ancestor of today's males lived in Africa between 35,000 and 89,000 years ago, according to a contested DNA analysis.
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Comfortably Numb
Scientists are finding the molecular targets of anesthetics.
- Anthropology
Gene implicated in apes’ brain growth
A gene with poorly understood functions began to accumulate favorable mutations around 8 million years ago and probably contributed to brain expansion in ancient apes.
- Health & Medicine
Cancer cells on the move
A new study suggests how a gene recently linked to liver, skin, and pancreatic cancer also causes an often-deadly form of breast cancer.
- Chemistry
Microbes Make the Switch: Tailored bacteria need caffeine product to survive
Bacteria that rely on a chemical derived from the breakdown of caffeine for their survival could help lead to the development of decaffeinated coffee plants.
- Health & Medicine
Persistent Cough: Pertussis rises in young adults and infants
Pertussis, or whooping cough, appears to be rebounding in many age groups, causing long-lasting symptoms in adolescents and adults and threatening the lives of unvaccinated infants.
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Two aspects of sleep share a master
A molecular connection between the timing of sleep—a part of circadian rhythms—and how long animals slumber each day is demonstrated for the first time.
- Health & Medicine
Carcinogens in the Diet
The U.S. government has added chemicals commonly found in overcooked meat to the list of potential cancer causers.
- Animals
Dangerous Times: Guppies don’t follow rules for old age
A study of wild guppies suggests that life in a dangerous place does not automatically push evolution toward rapid aging as previously thought.
- Health & Medicine
Drug Racing: Gene tied to HIV-drug response
A genetic mutation more common in blacks than in whites increases the odds that people taking a common HIV medicine will suffer side effects that lead them to halt treatment.
