Jonathan Losos
jblosos.bsky.social
Jonathan Losos
@jblosos.bsky.social
Evolutionary biologist, herpetologist, cat lover.
Amazon has decided to unload my books at bargain basement prices!
October 31, 2025 at 5:11 AM
If you look carefully, you'll see that the text is written by yours truly. I won't comment on that, but ther photographs are extraordinary! www.amazon.com/Feline-Photo...
Feline: Photographs
Amazon.com: Feline: Photographs: 9781419773648: Flach, Tim, Losos, Jonathan: Books
www.amazon.com
October 21, 2025 at 4:41 PM
3-legged lizards can thrive against all odds, challenging assumptions about how evolution works in the wild
theconversation.com/3-legged-liz...
3-legged lizards can thrive against all odds, challenging assumptions about how evolution works in the wild
Most lizards probably don’t survive devastating injuries. But a new study documents 122 cases of limb loss across 58 species – these exceptions shine a new light on natural selection.
theconversation.com
October 13, 2025 at 2:02 PM
Israel's Gaza War Has Made Me Ashamed to Be a Jewish Zionist
open.substack.com/pub/perilous...
Israel's Gaza War Has Made Me Ashamed to Be a Jewish Zionist
Israel's fight against Hamas started as a just war, but is now a moral travesty
open.substack.com
August 7, 2025 at 1:02 PM
At long last, The Cat's Meow featured in the New York Times...sort of. www.nytimes.com/.../books/re...
July 23, 2025 at 3:55 PM
Some Thoughts on Trumpism and Soviet Communism on a Visit to Prague
open.substack.com/pub/perilous...
Some Thoughts on Trumpism and Soviet Communism on a Visit to Prague
With Trump’s tariffs and immigration police, there are echoes of Eastern Europe’s authoritarian past
open.substack.com
July 19, 2025 at 2:24 PM
Non-native Herps Still Increasing in the Most Heavily Invaded Herp Community in the World. www.anoleannals.org/2025/07/06/n...
Non-native Herps Still Increasing in the Most Heavily Invaded Herp Community in the World.
There truly is never a dull moment in South Florida, especially for those of us who love herps. South Florida is a herper’s paradise with at least 63 exotic herps recorded in the state in addition …
www.anoleannals.org
July 6, 2025 at 1:06 PM
How I built a 6 foot long stainless steel anole lizard sculpture: the Movie www.anoleannals.org/2025/06/03/h...
How I built a 6 foot long stainless steel anole lizard sculpture: the Movie
Read about Steve Nielsen, the artist, here.
www.anoleannals.org
June 3, 2025 at 10:42 PM
Reposted by Jonathan Losos
Here's a story about how breeding has smushed so many pet skulls that Persians and pugs resemble eachother more than their wild ancestors. Research from @jblosos.bsky.social 🧪 🐕 🐈 💀 source.washu.edu/2025/04/copy...
Copycat evolution
Biologist Jonathan Losos, in Arts & Sciences, has documented evidence of a kind of "copycat" evolution between extremely short-faced breeds of cats and dogs. Generations of intentional breeding have l...
source.washu.edu
April 29, 2025 at 5:41 PM
Reposted by Jonathan Losos
I’m beyond proud to share that I’ve officially earned my Ph.D. and served as Student Marshal for the School of Medicine at WashU! Grateful to my advisor, @jblosos.bsky.social, my committee, and everyone who supported me. And now, on to the next chapter!
May 15, 2025 at 1:23 AM
USFWS and NOAA have a proposed rescinding the definition of “harm” under the Endangered Species Act. Presently, “harm” includes habitat modifications, such as those due to land-use change, invasive species, pollution. The new rule would be much more limited

www.federalregister.gov/documents/20...
Rescinding the Definition of “Harm” Under the Endangered Species Act
The U.S. Fish and Wildlife Service (FWS) and the National Marine Fisheries Service (NMFS) (collectively referred to as the Services or we) are proposing to rescind the regulatory definition of "harm" ...
www.federalregister.gov
May 18, 2025 at 2:15 PM