1,416 results
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First gene-altered primate beats the odds
Oregon researchers have slipped a jellyfish gene into a rhesus monkey to create the first genetically modified primate.
- Health & Medicine
What Activates AIDS?
New studies suggest that a natural process called immune activation—the signaling that alerts immune cells of foreign invaders—plays a key role in explaining why infection with the human immunodeficiency virus progresses to AIDS more quickly in some people than in others.
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Embryo stem cells turned to blood
Human embryonic stem cells may provide a new source of blood and bone marrow.
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Biology of rank: Social status sets up monkeys’ cocaine use
Male monkeys' position in the social pecking order influences their brain chemistry in ways that promote either resistance or susceptibility to the reinforcing effects of cocaine.
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Brains show evolutionary designs
Mammal species exhibit basic types of brain design from which they have evolved a wide array of brain sizes, according to a new analysis.
- Animals
Crows appear to make tools right-handedly
A study of 3,700 leaf remnants from crows making tools suggests that the birds prefer to work "right-handed."
- Health & Medicine
HIV-related viruses still cross species line
Various potentially dangerous strains of simian immunodeficiency virus exist in wild primates in Africa and are still being spread among people who hunt the animals for meat.
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Baboon rumps signal quality of motherhood
The size of the swellings on a female baboon’s rump match her physical prowess for motherhood, a rare case of reproductive-quality advertisement in females.
- Anthropology
Ishi’s Long Road Home
The reappearance of a California Indian's preserved brain, held at the Smithsonian Institution since 1917, triggers debate over the ethics of anthropological research and the repatriation process.
- Health & Medicine
Could this be the end of the monthly period?
Two compounds stop menstruation in monkeys, suggesting that similar drugs might someday enable women to bypass monthly bleeding.
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Dolly Was Lucky
Scientists studying the data on animal cloning argue that cloning a person would be unsafe.
- Animals
Wild gerbils pollinate African desert lily
Scientists in South Africa have found the first known examples of gerbils pollinating a flower.
