When summer’s bounty of bugs, seeds, and nectar starts to wane, most birds in Colorado seek warmer climes with good food to offer. But one group of birds sticks it out year-round, subsisting on ...

From the surgical services of the Massachusetts General Hospital. † Assistant in surgery, Harvard Medical School; assistant in surgery, Massachusetts General Hospital. ‡ Assistant in surgery ...

More than 90% of methane emissions in ruminants occur in the rumen, while the hindgut, especially the cecum, is known for its low methane production, though its microbial processes remain largely ...