Image of the Day: Baby Boom
Image of the Day: Baby Boom

Image of the Day: Baby Boom

Researchers describe the remains of a clutch of extinct mammal-like animals.

Sukanya Charuchandra
Sukanya Charuchandra

Originally from Mumbai, Sukanya Charuchandra is a freelance science writer based out of wherever her travels take her. She holds master’s degrees in Science Journalism and Biotechnology. You can read...

View full profile.


Learn about our editorial policies.

Aug 31, 2018

ABOVE: Left to right: CT scans of the skulls of a tuatara hatchling (modern reptile), offspring of the mammal-like Kayentatherium wellesi, and a 27-day-old opossum (modern mammal)
EVA HOFFMAN

Apaper published August 29 in Nature describes the discovery of a mammal-like adult creature, named Kayentatherium wellesi, and 38 of its probable young, fossilized in the early Jurassic, 184 million years ago in present-day Arizona. These offspring are the youngest mammal-like creatures discovered in fossil form to date. 

CT scans of the skulls of a tuatara hatchling (left) and a 27-day-old opossum (right)
EVA HOFFMAN 

E.A. Hoffman, T.B. Rowe, “Jurassic stem-mammal perinates and the origin of mammalian reproduction and growth,” Nature, doi:10.1038/s41586-018-0441-3, 2018.

Interested in reading more?

The Scientist ARCHIVES

Become a Member of

Receive full access to more than 35 years of archives, as well as TS Digest, digital editions of The Scientist, feature stories, and much more!
Already a member?