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Health & MedicineRisk Factor: Throat cancer linked to virus spread by sex
Cancer of the throat and tonsils can arise from infection with a sexually transmitted virus.
By Nathan Seppa -
HumansLethal injection is inhumane, say researchers
Prisoners killed by lethal injection may be conscious and experience pain and burning sensations while they asphyxiate.
By Brian Vastag -
AnimalsSex—perhaps a good idea after all
A family of mites may be the first animal lineage shown to have abandoned sexual reproduction and then reevolved it millions of years later.
By Susan Milius -
Health & MedicineA smart pill for seniors?
A dietary supplement combo boosts older adults' performance on simple mental tests.