An artist's rendering of the ancient arthropod Erratus sperare
Anatomical Firsts in Early Arthropods
A team of scientists have discovered an ancient arthropod that may show the origins of branched limbs and the first gill-like breathing structures in the clade.
Anatomical Firsts in Early Arthropods
Anatomical Firsts in Early Arthropods

A team of scientists have discovered an ancient arthropod that may show the origins of branched limbs and the first gill-like breathing structures in the clade.

A team of scientists have discovered an ancient arthropod that may show the origins of branched limbs and the first gill-like breathing structures in the clade.

limb development
lewis wolpert obituary developmental biology embryo 14 day rule
High Profile Developmental Biologist Lewis Wolpert Dies at 91
Shawna Williams | Feb 16, 2021
Wolpert, who conducted research at University College London, was known for his work on morphogenesis and pattern development in embryos and for his multiple books and broadcast appearances.
A Simple Genetic Change Adds Limb-Like Bones to Zebrafish Fins
Abby Olena | Feb 5, 2021
A gain-of-function mutation in a single gene reveals ancient limb-forming capacity that has been preserved for hundreds of millions of years.
Image of the Day: Swiss Army Crustacean
The Scientist Staff and The Scientist Staff | May 2, 2018
The tools researchers used to study how this amphipod’s limbs develop could help inform our understanding of cell lineages and fates.
Image of the Day: Original Fin
The Scientist Staff and The Scientist Staff | Apr 2, 2018
Researchers identify the genetics underlying the development of dorsal fins in ancient fish.
Nailing Regeneration
Sabrina Richards | Jun 12, 2013
Researchers identify the signaling program that enables finger and toenail stem cells to direct digit regeneration after amputation.
All In Proportion
Savraj S. Grewal | Mar 1, 2013
Drosophila insulin-like peptides (dILPs) regulate part of the signaling pathway that helps keep organs growing in proportion during development.
Instant Messaging
Savraj S. Grewal | Mar 1, 2013
During development, communication between organs determines their relative final size.
Rita Levi-Montalcini Dies
Kelly Rae Chi | Jan 1, 2013
The neurophysiologist who earned a Nobel Prize for discovering nerve growth factor has passed away at age 103.
Skeleton Keys
Lewis Wolpert | May 14, 2011
There are a surprising number of unknowns about how our limbs come to be symmetrical.