(Darwin 131–132) In the years following Darwin's work, biologists formally rejected the ladder of life in favor of the tree concept. Nonetheless, many current discussions of evolution ...

It's NFL Explained: Evolution of the QB tree! It has been dubbed the highest profile position in all of sports: the NFL quarterback. So it's time to see how the position has evolved, from a time ...

Intracellular endosymbionts that originally descended from free-living prokaryotes have been important in the evolution of eukaryotes by giving rise to two cytoplasmic organelles. Mitochondria ...