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Life

Deadly influenza could strike aboriginal groups hardest

Native Alaskans and Australians tend to lack potent flu-fighting immune cells.

Neuroscience

Hormone hampers effects of marijuana

Study of pot-blocking brain chemical in rodents could lead to new treatments for cannabis addiction.

Animals

Flightless birds face extinction

New Zealand’s flightless birds have limped through the last few decades, but conservation efforts have had some success.

Microbes

Gut bacteria respect diets, not borders

Malawian and Guahibo gut microbiomes resembled those of herbivorous mammals, while American guts were more similar to carnivores’.

Climate

Mangroves move up Florida’s coast

Satellite images reveal that the tropical trees are expanding north up Florida’s Atlantic coast, taking advantage of rising winter temperatures.