New research challenges the view that proteins are the only key to evolution, highlighting the importance of lipids.

Q: Why do we humans have a hard time understanding, and sometimes accepting, evolution? What, in your opinion, is the major stumbling block? A: Deep time is hard to grasp. I don't know that it or ...

Still, if evolution is gradual ... But in 1972, evolutionary scientists Stephen Jay Gould and Niles Eldredge proposed another explanation, which they called "punctuated equilibrium." ...

Most importantly, evolution does not progress toward an ultimate or proximate goal (Gould 1989). Evolution is not "going somewhere"; it just describes changes in inherited traits over time.

Adapted from Criticizing Science: Stephen Jay Gould and the Struggle for American ... more empirically grounded in its treatment of human evolution than the popular works of Robert Ardrey, Konrad ...

Whether or not it happened that way—Gould argued against it—Walcott ... major branches on the tree of life, left behind by evolution, most likely in one of the mass extinctions that punctuate ...

Does evolution happen slowly or quickly? There are two main schools of thought about the tempo and mode of macroevolution (Eldredge & Gould 1972, Eldredge et al. 2005). One group holds that ...