All Stories by John Travis
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Dolly Was Lucky
Scientists studying the data on animal cloning argue that cloning a person would be unsafe.
- Health & Medicine
Sperm Protein May Lead to Male Pill
A protein that helps sperm move their tails may be a perfect target for a male contraceptive.
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Brain scans reveal human pheromones
Male and female brains react differently to two putative pheromones, compounds related to the hormones testosterone and estrogen.
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NO says yes to breathing fast
A form of nitric oxide tells the brain when the body needs to breathe faster.
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Vesicles may help embryos take shape
Chemicals that shape developing embryos may hitch rides in vesicles called argosomes.
- Health & Medicine
Aging cells may promote tumors nearby
Cells that enter a state called senescence in older individuals may stimulate nearby cells to become tumors.
- Health & Medicine
Blood vessels (sans blood) shape organs
Even before they begin to carry blood, blood vessels provide signals that help spark the development of organs such as the liver.
- Health & Medicine
Alcohol on your breath need not be all bad
Drugs such as insulin may be delivered by inhaling mists of medicine-containing alcohol.
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Brief diet alters gene activity
Even a short-term diet may activate anti-aging genes.
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Homing in on a longevity gene
A gene on chromosome 4 may help people live to an old age.
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Embryo stem cells turned to blood
Human embryonic stem cells may provide a new source of blood and bone marrow.
- Health & Medicine
Arteries may be vulnerable to HIV attack
HIV may directly interact with cells in arteries, predisposing people to heart attacks.
