Connecting millions of pieces
Creating the entire tree of life is like completing a jigsaw puzzle with more than two million pieces. And to make it even harder; the illustration of how the solved puzzle would look like is missing.
No one knows precisely how all pieces are related.
This disparity is unmistakably demonstrated by disagreements between evolutionary biologists about how certain species and branches are linked together. Throughout the years they have created a large variety of trees with specific groups of species that contradict each other. For example, one researcher maintains that species A is the closest living relative of species B, but another scientist thinks that species C is actually most closely related to B. (more…)