All Stories by John Travis
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Ibuprofen cuts Alzheimer protein build-up
The common nonprescription drug ibuprofen may lessen abnormal accumulation of beta-amyloid in the brain, perhaps explaining how the drug decreases the risk of developing Alzheimer's disease.
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Putting Out the Welcome Mat: Chemical guides germ cells to gonads
A chemical made in the gonads attracts the embryonic cells that will one day form eggs or sperm.
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Silence of the Xs
Does junk DNA help women muffle one X chromosome?
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Ebola protein explains deadly mystery
The infamous virus called Ebola has a surface protein that kills cells in blood vessels.
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Autism Advance: Mutated genes disrupt nerve cell proteins
Two gene mutations that cause autism suggest that nerve cell connections called synapses are key to the disorder.
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Sperm show age
The quality of a man's sperm declines as he gets older.
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Human RNA genes counted up
People possess about 250 genes that encode short RNA strands rather than DNA.
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By a Nose? Human sperm may sniff out the path to an egg
A man's sperm appear to possess a primitive kind of nose that enables them to navigate to a woman's egg by scent.
- Health & Medicine
Protein protects rat brains from strokes
Neuroglobin, a protein related to hemoglobin, may protect the brain during strokes.
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A Tale of the Tapeworm: Parasite ploy suggests drug-delivery tactic
A chemical used by tapeworms to slow intestinal pulsations may help people absorb drugs more efficiently.
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Discovery of bitter-taste gene is sweet
Scientists have found that variations in a gene explain why people differ in their ability to taste bitterness.
- Health & Medicine
Abortion-cancer link is rejected
A workshop report concludes that abortions do not increase a woman's chance of developing breast cancer.
