Weakened viruses used in vaccines can swap genes and produce disease-causing strains.
Weakened viruses used in vaccines can swap genes and produce disease-causing strains.
Guppies with experimentally shrunken brains produced more offspring than guppies bred for larger noggins, confirming a long suspected tradeoff of bigger brains.
A new study finds that an Alaskan population of the fish has quickly evolved in response to warming temperatures.
A nuclear war could have profound effects on crops yields around the world, according to a new study.
A federal appeals court upholds the Environmental Protection Agency’s right to regulate air pollution under the Clean Air Act.
Louisiana’s salt marshes are recovering from the Deepwater Horizon oil spill, but some areas have been irreversibly lost.
Sampling for potentially pandemic strains of influenza virus at hog farms is lax compared with poultry farms, worrying some experts.
A single camera unit can capture a moment in time at a mind-boggling resolution.
The second of the two controversial bird flu papers is published in Science, revealing that just five mutations can render the virus transmissible between ferrets.
A yellow-bellied dwarf toad, last sighted in 1876, is rediscovered in Sri Lanka.