Why do female red squirrels mate with up to 14 males in a single day? Opportunity, research concludes.
A mouse genetically engineered to age faster is tweaked to experience reverse aging.
Some animals, particularly invasive species, could wreak havoc on the local environment if they escaped.
In an effort to understand the myriad of health issues that can impact frequent fliers, a team of hamsters have spent a month in a perpetual jet-lagged state.
They may be pests in a house, but in a war zone, these rats can be lifesavers.
High estrogen levels in women while they are ovulating may be responsible for problems concentrating.
If you have the flu, you may look sick to a human, but these disease-detecting animals can actually smell illness.
By measuring the size of poop pellets from these diminutive mammals, scientists reconstruct rainfall levels from years past.
When they get acupuncture, mice release a natural pain-relieving molecule that scientists have never linked with the treatment before.
A new "facebook" of expressions of mice in pain could speed along the development of pain relievers for humans.