Twins are pretty rare, accounting for just 3% of births in the U.S. these days. But new research shows that for primates 60 ...

"This is unusual and tells us a lot about how mammals' evolution took place.” Small mammals living today have much shorter lifespans, some surviving for as little as 12 months, and maturing ...

However, 60 million years ago, having twins was the norm among primates, which changed everything anthropologists understood ...

a species considered to be more closely related to mammals. This evidence suggests that the evolution of the mammalian jaw ...

Marsupial moles are perhaps Australia's most bizarre mammals. Known as "itjaritjari" to the Indigenous Aṉangu people and featuring prominently in their tales, the marsupial mole is rarely observed, ...

We have been researching the evolution of primate litter size – how many babies grow during each pregnancy – for the past several years. To study mammal evolution and reproductive life history ...

An international team of scientists has uncovered a fascinating piece of the evolutionary puzzle: how the ventral nerve cord, a key component of the central nervous system, evolved in ecdysozoan ...

The tests help explain evolution among saber-toothed predators. There are at least five different examples of such teeth at different points in time. Those teeth’s ability to puncture yet not break ...

Researchers have uncovered why the formidable teeth of saber-toothed predators like Smilodon were evolutionarily advantageous ...