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 ...

The researchers extended their analysis to eight exemplary fossil species from four continents spanning 300 million years of evolution. The species ranged from the 35g proto-mammal Megazostrodon ...

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 ...

The best example we have of evolution at a specific hot spot is ... to be selection against excessive crossing over, why are mammalian species so variable in their numbers of chromosomes and ...

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 ...

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 ...

It may seem like a complete contradiction, but evolution can sometimes also mean involution. This is the case for two marine ...

This finding sheds new light on the evolution of the mammalian ear, highlighting how structures can transform over time to serve new functions. The outer ear is unique to mammals, but its ...