The year's top paleontological wonders ranged from a 540-million-year-old penis worm to a decades-old rodent impression.

A new study found that rats with high stress levels were more likely to self-administer a hit of vapourized cannabis.

Nottingham City Council has broken its months-long silence over fears of a rat infestation at a popular city park. In ...

Where the 370 residents of San Jose’s Columbus Park homeless encampment landed and how they are acclimating – and how NIMBY ...

In the Middle Ages, a plague killed a third of Europe's population. Fleas carried the plague bacterium, Yersinia pestis, ...

(THE CONVERSATION) Rats and other rodents and pests can make great archivists.

In humans, only two genes have been reliably linked to gut bacteria: the lactase gene, which influences milk-digesting ...

Treasure Valley reports sharp rise in rat calls; pros see widespread presence. Rats exploit urban change, warmer winters and ‘human subsidies’ for survival. Experts say control is more likely than ...

In the first study of its kind, scientists found a correlation between climate change and a rise in urban rat populations. A rat scurries across West Broadway in New York City. A study looking at rat ...

New videos reveal the surprising dynamics of bat-rat relationships—and suggest how human activity is fueling these interspecies conflicts. A rat attacks a bat as it flies by in this still image from a ...

Researchers have long established that hormones significantly affect the brain, creating changes in emotion, energy levels, and decision-making. However, the intricacies of these processes are not ...

IRVINE, Calif. (KABC) -- A house of horrors in Orange County overrun with rats has been declared a public nuisance by the city of Irvine as neighbors grow frustrated with rodents roaming around freely ...