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 ...

Tree diagrams have been used ... Tips C and D are therefore more closely related to each other than either is to tip A or tip B. The diagram also shows that tips B, C, and D all share a more ...

Scientists represent evolutionary relationships with tree diagrams (also called cladograms) because new life forms appear the way new branches appear on a growing tree. So, you can read a tree ...

In it, Darwin relied on a diagram called "The Tree of Life" to help explain his theory of evolution, setting aside eight pages to detail its features. In a letter to his editor a few months before ...