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Evolution
High-ranking hyena mothers pass their social networks to their cubs
High-ranking hyena mothers pass their social networks to their cubs
Using 27 years of detailed data on hyena social interactions, a team led by Penn biologists nailed down a pattern of social network inheritance and its implications for social structure, rank, and survival.
For early amphibians, a new lifestyle meant a new spine
For early amphibians, a new lifestyle meant a new spine
Moving from water to land and back again corresponded with distinct changes in animals’ spinal morphology, according to a new study led by paleontologist Aja Carter.
Newly described horned dinosaur from New Mexico was the earliest of its kind
Newly described horned dinosaur from New Mexico was the earliest of its kind
With a frilled head and beaked face, Menefeeceratops sealeyi lived 82 million years ago, predating its relative, Triceratops. Researchers including Peter Dodson, of the School of Veterinary Medicine, and Steven Jasinski, who recently earned his doctorate from the School of Arts & Sciences, describe the find.
‘Pompeii of prehistoric plants’ unlocks evolutionary secret
‘Pompeii of prehistoric plants’ unlocks evolutionary secret
An international research team, including Hermann Pfefferkorn of the School of Arts & Sciences, has solved the mystery of where 300-million-year-old specimens fit into the plant family tree.
Merging big data and marine biology
Merging big data and marine biology
Junior Ashna Sethi found an opportunity to delve into one of her passions this summer with paleobiologist Lauren Sallan’s lab in the School of Arts & Sciences.
Cave discovery holds clues to earliest Homo sapiens in Europe
Cave discovery holds clues to earliest Homo sapiens in Europe
Ancient DNA from 46,000-year-old bone fragments and a tooth reveals this group likely overlapped with Neanderthals for thousands of years.
New feathered dinosaur was one of the last surviving raptors
New feathered dinosaur was one of the last surviving raptors
Dineobellator notohesperus lived 67 million years ago. Steven Jasinski, who recently earned his doctorate from the School of Arts and Sciences working with Peter Dodson, also of the School of Veterinary Medicine, led the effort to describe the find.
Illuminating interactions between decision-making and the environment
Illuminating interactions between decision-making and the environment
With a unifying model based in game theory, Andrew Tilman, Joshua Plotkin, and Erol Akçay of the School of Arts and Sciences inform dynamics in fields as diverse as ecology and economics.
Genes play a role in dog breed differences in behavior
Genes play a role in dog breed differences in behavior
Border collies are highly trainable, greyhounds love to chase, and German shepherds make good guard dogs. While the environment plays a role, traits like these are highly heritable. A new study identifies 131 genetic variants associated with breed differences in behavior.
Fruit flies’ microbiomes shape their evolution
Fruit flies’ microbiomes shape their evolution
In just five generations, an altered microbiome can lead to genome-wide evolution in fruit flies, according to new research led by Paul Schmidt and postdoc Seth Rudman of the School of Arts and Sciences.