Neanderthals carried genes acquired from ancient interactions with ‘cousins’ of modern humans
A new collaborative study led by Sarah Tishkoff shows that Neanderthals inherited at least 6% of their genome from a now-extinct lineage of early modern humans.
Conflicts and cultural evolution: All for one and one for all?
Researchers from the School of Arts & Sciences show that, when it comes to learning and honing different skills, what’s better for the individual isn’t always better for the group.
The evolution of societal cooperation
Research led by the School of Arts & Sciences’ Joshua Plotkin and Taylor Kessinger sheds light on the impact of social contexts and multilayered societies on promoting cooperative behavior.
How species partnerships evolve
Biologists from the School of Arts & Sciences explored how symbiotic relationships between species evolve to become specific or general, cooperative, or antagonistic.
An arms race that plays out in a single genome
School of Arts & Sciences biologist Mia Levine and Cara Brand, a postdoc, shed light on an example of coevolution in fruit flies that has implications for human health.
Rapid adaptation in fruit flies
New findings from School of Arts & Sciences biologists show that evolution—normally considered to be a gradual process—can occur in a matter of weeks in fruit flies in response to natural environmental change.
Context-dependent behavior can make cooperation flourish
Recent studies led by School of Arts & Sciences’ researchers show that changing social strategies between settings—for example, cooperating at home but not at work—can in fact lead to more cooperative behavior in a society.
From corals to humans, a shared trigger for sperm to get in motion
Coral sperm require a specific pH to move, according to research from the School of Arts & Sciences, which identifies a signaling pathway that is shared by organisms including humans. The results inform how corals may fare with climate change.
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
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.