Tag: Earth

When the first warm-blooded dinosaurs roamed Earth

DALLAS (AP) — Scientists once thought of dinosaurs as sluggish, cold-blooded creatures. Then research suggested that some could control their body temperature, but when and how that shift came about remained a mystery. Now, a new study estimates that the first warm-blooded dinosaurs may have roamed the Earth about 180 million years ago, about halfway […]

32 of the most colorful birds on Earth

Nature produces some truly extravagant costumes, and birds have evolved more than their fair share of dazzling outfits. Often, it’s the male birds that steal the show with bold colors and unfurling feathers, which they need to impress choosy females. But sometimes, both males and females are dressed to impress. You’re probably familiar with the […]