- Mammals were adapting from life in the trees to living on the ground before dinosaur-killing asteroid, research reveals Phys.org
- When the Dinos Died, Mammals Were Already Adopting Terrestrial Lifestyles Discover Magazine
- Mammals moved to land before dinosaur-killing asteroid struck 66 million years ago Interesting Engineering
- Tiny Fossils Reveal Mammals Left the Trees Long Before the Asteroid Impact SciTechDaily