The tree of life might seem like a stable design, appropriate for indelible ink. Plenty of people think so. An Internet search for “phylogenetic tattoos” turns up some showy skin art. But the branches ...

Bacteria fill the Earth, and a new scientific study reveals just how prevalent they are. Scientists led by biologist Laura Hug, who currently teaches at the University of Waterloo, mapped a new Tree ...

All species on Earth, both living and extinct, are related. We know this because of a biological tool called the tree of life. This "tree" takes the form of a diagram that maps the relationships ...