Environmental filtering Researchers studied bioregions across the world, examining species from very different life forms: amphibians, birds, dragonflies, mammals, marine rays, reptiles, and trees.

Scientists have discovered a completely new branch on the tree of life. This “supergroup” contains an incredibly diverse range of predatory microbes that are extremely different genetically ...

Take Eukarya, for example. This huge branch includes all multicellular life. Over the course of millions of years, it splits into distinct evolutionary lineages known as clades.