News
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Health & MedicineComb over Chemicals: Tool may rid heads of pesticideproof lice
Used systematically, special combs may be more effective than insecticidal shampoos at ridding a child's scalp of head lice.
By Ben Harder -
AnthropologyReservoirs of Evolution: Rainy periods linked to human origins in Africa
Three phases of heavy rainfall in eastern Africa between 2.7 million and 900,000 years ago created deep lakes and might have played a critical role in the evolution of human ancestors.
By Bruce Bower -
Health & MedicineOutwitting TB: Enhanced vaccine protects mice in lab tests
An enhanced vaccine appears to offer better protection against tuberculosis than the current version does, a study in mice suggests.