If we look across the whole of the mammal branch of the tree of life, we find there are many groups of mammals that have ...

5 fun facts about evolution The last common ancestor of all life on Earth is estimated to have existed around 4.2 billion years ago. There are three ingredients necessary for natural selection to ...

The largest timed molecular phylogenetic tree of life, called a "timetree," to date includes just over 200 primate species, while the largest synthetic timetree, drawing from over 4,000 published ...

Paleontologists unearthed fossils in the Grand Canyon dating back more than 500 million years that offer a new look into a ...

Long known as a messenger within cells, RNA is increasingly seen as life’s molecular communication system — even between organisms widely separated by evolution. Cells across the tree of life can swap ...

A tree of life based on genes from across the nuclear genome and containing nearly 60% of all angiosperm genera unveils the complex evolutionary history of flowering plants. This tree both ...

A version of this article appears in print on Dec. 17, 2024, Section D, Page 3 of the New York edition with the headline: A ‘Second Tree of Life’ Could Wreak Havoc.

In the evolutionary tree of life, organisms that have eukaryotic cells are all on the same branch, suggesting this type of cell evolved only once. VectorMine/iStock via Getty Images Plus ...

It is why life takes "such endless forms most beautiful and wonderful," as British biologist Charles Darwin wrote in his famous 1859 book " On the Origin of Species." You can thank evolution for ...