Elephants gathered at a watering hole in the relative safety of Serengeti National Park. In unprotected areas with dense human populations, the animals showed higher stress hormone levels.
Striations in teeth reveal the pace of life.
A major coffee pest relies on bacteria in its gut to metabolize caffeine.
The offspring of coral exposed to harsh conditions may be better prepared to deal with climate change.
How honey bees pass on immunity to their young.