Decreased physical activity in mammals can lead to significant bone loss and increased fracture risk over time. Yet this is not quite the case for the black bear (Ursus americanus), who is physically inactive for up to six months annually but somehow manages to keep a strong, healthy skeletal struct...
New findings published in the Proceedings of the Royal Society B reveal that brain regions for central cognitive processing in social insect species actually shrank over time--the opposite pattern seen with sociality in other vertebrate animals, including mammals, birds and fish.
How does elevation impact evolution? That's exactly what scientists have asked themselves as they've examined the mammals of the ancient past.
Seals are helping scientists plumb the depths of the world's remotest oceans. After hooking up seals with sensors, researchers have collected data that builds a detailed picture of areas that are currently difficult for humans to visit.
What did extinct animals eat? That's a question that scientists are now studying, thanks to tooth enamel.
The asteroid that caused the dinosaurs to become extinct may have also almost wiped out mammals. Scientists have found that 66 million years ago, many mammals died alongside the dinosaurs.
Scientists have discovered a new fossil from Madagascar that reveals fascinating perspectives on the growing diversity of Mesozoic mammals.
Imagine a groundhog that weighs 20 pounds or more. Now imagine that groundhog living during the age of the dinosaurs.
Mammals may have appeared on our planet far earlier than thought. Paleontologists have uncovered three new small squirrel-like species that lived about 208 million years ago during the late Triassic.
It turns out that the ancestors of ancient mammals may have been nocturnal. The new research reveals that the transition to nocturnality occurred far earlier than previously expected.
Scientists have taken a look at tiny fossil mammals and have found that during the Jurassic, the animals developed new characteristics, such as teeth capable of precise chewing.
Scientists have unraveled one of the riddles of mammal evolution. They've discovered why mammals have a strong conservation in the number of their trunk vertebrae; it all has to do with the essential role of speed and agility.