Evolutionary biology

Two views, one from above and one from the side, of a mottled, large-bodied fish with four short fins and a large paddle-shaped tail

How fish fins evolved just before the transition to land

Sloth

Study shakes up sloth family tree

Men’s attitudes toward babies linked with hormonal responses to sexually explicit material

Evolutionary study finds neglected fin may have a function

University of Chicago and Marine Biological Laboratory agree to form affiliation

New book connects the human community to its cosmic roots

A new take on the games people play in their relationships

Neil Shubin, Pier Oddone elected to National Academy of Sciences

Leigh Van Valen, evolutionary theorist and paleobiology pioneer, 1935-2010

Wimsatt Fest to feature discussion on philosophy and history of biology