The present theory offers a unified solution to three closely related evolutionary problems. (1) Why does an evolving population explore only a small fraction of the accessible pathways in genotype ...

A random mutation in a gene can alter its function and bring about a new characteristic that can pass down for many generations, but this may not be the only way that organisms can inherit a trait.

In the years of the post-Darwinian debate, many American naturalists invoked the name of Lamarck to signal their belief in a purposive and anti-Darwinian view of evolution. Yet Weismann's theory of ...

We have an HHS Secretary in Robert F. Kennedy Jr. whose dissemination of misinformation about vaccines in the form of books, commentaries and public announcements is now too voluminous to quantify.

Harmful genetic changes in sperm become substantially more common as men age because some are actively favored during sperm ...

New research from across the globe found that the ‘fuel of evolution’ in wild animals is two to four times more abundant than previously thought Climate change is forcing animals to adapt—and fast.