In a groundbreaking study, scientists have discovered that common vampire bats (Desmodus rotundus) possess a unique metabolic strategy, burning proteins directly for energy during exercise—a trait ...

For vampire bats, regurgitating blood into a roostmate's mouth is a sign of ultimate trust. It's a risky strategy for the creatures, who don't know if donating their food will be reciprocated. Vampire ...

Most mammals respond to the demands of exercise in the same way, by breaking down carbohydrates and stored lipids (fats) in their bodies, releasing the energy they need to keep functioning. But every ...