With no training, bumblebees can work out how to use a ball like a ladder to feed on sugar from an out-of-reach flower.

Vaccination remains the priority, but some researchers are looking for drugs to fight the virus in people who don't get the shot.

Answers to key questions could help public health officials develop Ebola treatments, predict the outbreak’s trajectory and prevent a future one.

Lab experiments suggest mosquitoes can smell DEET and learn to associate it with food, but it’s unclear whether that happens in the wild.

Rather than catching a yawn on sight, muscles squeezing the uterus could be the trigger for a fetus to catch a yawn from its mother.

Some rodents in South America carry arenaviruses and hantaviruses. Climate change may bring both to regions where neither is currently a threat.