All species alive today, from chimpanzees to bacteria, are cousins that each have equally long lineages, rather than ...

Oxygen fills the air today, but for most of Earth’s early history it barely existed. Scientists say the atmosphere did not hold steady oxygen until about 2.

Johann Wolfgang von Goethe is one of the most renowned thinkers in history. He’s Germany’s greatest literary figure, famous ...

Other near universal welfare issues among small pets — which apply to our cats and dogs, too — include monotonous and unnatural diets, boredom, and lack of enrichment. Pierce said that handling can ...

I grew up in the Maryland suburbs and spent much of my childhood in the woods. I would turn over rocks to find shiny ...

Life’s story may stretch further back than scientists once thought. Some genes found in nearly every organism today were already duplicated before all life shared a common ancestor. By tracking these ...

Researchers and volunteers in Texas documented birds of different species preening one another. Experts say the behavior may be more common than documented.

Researchers describe a rare type of gene family, known as “universal paralogs”, that provides insight into evolutionary history predating the last universal common ancestor of all life. Detailed ...

Duplicated genes that appear in every branch of the tree of life can provide us with insight into the evolution that occurred ...