Hair, feathers, and scales: An evolutionary tale

Cracking the armor

Crocodile head scales are not developmental units but emerge from physical cracking

Annotated by Desiree Stanley

Annotated on 06/02/2014

Originally published 11/29/2012

Heads or tails?

Polarized notum activation at wounds inhibits Wnt function to promote planarian head regeneration

Annotated by Melissa McCartney PhD

Annotated on 03/13/2012

Originally published 05/13/2011