Scientists have discovered the oldest known animal with saber teeth: a predator that lived 270 million years ago. This animal, from before the age of the dinosaurs, was a dog-like creature that was ...
That's bad news for bighorn ... Dec. 3, 2024 — Brain tissue is among the most energetically costly in the body, and as a result, larger-brained mammals require more energy to support brain ...
Many conservationists believe barred owls are the biggest threat to spotted owls because they are more aggressive and outcompete spotted owls for many of the same resources.