When the dinosaurs vanished, mammals exploded in size almost overnight—here's the wild science behind that 1,000-times growth spurt.

For mammals, one secret to a long life may be spending it living with friends and family. An analysis of the life spans and social lives of nearly 1,000 mammal species shows that species that live in ...

Scientists have taken a deep dive into the wild world of mammalian evolution. An international team of more than 100 researchers has analyzed genetic information from 240 mammalian species. Using the ...

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Fluorescent anatomy, which recently seemed to be a quirk in unusual animals such as platypuses and opossums, was found in most living families of mammals. By Cara Giaimo At first, it seemed to be ...

Researchers reveal new insights into the complex evolutionary history behind the distinctive upright posture of modern placental and marsupial mammals, showing the transition was surprisingly complex ...

Researchers have characterized changes in the structure of motor proteins, called myosins, and energy consumption that occur during hibernation, highlighting key differences in large and small ...

An unusual fossil found in China suggests that some early mammals may have preyed on dinosaur, according to new research. The fossil — which is reported to have dated back to around 125 million years ...

Despite a common narrative that male mammals tend to dwarf female ones, fewer than half of mammalian species display that pattern, a new study suggests. By Emily Anthes Female elephant seals are not ...