Some ancient traits were lost and had a major influence on mammal evolution. One of the significant losses among mammal ancestors was gastralia, or belly ribs. Early synapsids like Ophiacodon had ...

"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 ...

The researchers extended their analysis to eight exemplary fossil species from four continents spanning 300 million years of ...

All living mammals today, including us, descend from the one line that survived. During the next 145 million years of evolution, the dominance of dinosaurs ensured that our distant mammalian ...

As evolutionary biologist Neil Shubin points out, "In one sense, evolution didn't invent anything new with whales. It was just tinkering with land mammals. It's using the old to make the new." ...

Anyone [similarly] fascinated with fossils, evolution, and the history of continent-scale ecosystems should find this ... I look forward to later volumes in the series and anticipate that these books ...

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

The chance discovery of a long-forgotten tray of fossils in the collections of the Australian Museum has highlighted a previously unknown “Age of Monotremes” that thrived while dinosaurs ruled the ...