War, politics and religion shape wildlife evolution in cities

Humans change the urban landscape with religious, cultural and political activities, which in turn can influence the evolution of urban animals and plants.

Elizabeth Carlen, Living Earth Collaborative Postdoctoral Fellow, Washington University in St. Louis • conversation
July 3, 2025 ~10 min

Wild marmots’ social networks reveal controversial evolutionary theory in action

Multilevel selection is a controversial concept originally proposed by Darwin. A new study found evidence for it in the wild in a group of marmots scientists have been observing for more than 60 years.

Daniel T. Blumstein, Professor of Ecology and Evolutionary Biology, Institute of the Environment and Sustainability, University of California, Los Angeles • conversation
March 27, 2025 ~9 min


Evolving intelligent life took billions of years − but it may not have been as unlikely as many scientists predicted

Humans evolved late in Earth history. While this timing inspired the conclusion that humanlike life is a cosmic improbability, a new study pushes back.

Jennifer L. Macalady, Professor of Geoscience, Penn State • conversation
Feb. 14, 2025 ~10 min

Twins were the norm for our ancient primate ancestors − one baby at a time had evolutionary advantages

Twins are pretty rare, accounting for just 3% of births in the US these days. But new research shows that for primates 60 million years ago, giving birth to twins was the norm.

Jack McBride, Ph.D. Student in Anthropology, Yale University • conversation
Dec. 16, 2024 ~8 min

Ferns’ ability to evolve ‘backward’ offers insights into the meandering path of evolution

Evolution is often depicted as a steady forward march from simple to complex forms. But new research shows that certain ferns can evolve ‘backward.’

Jacob S. Suissa, Assistant Professor of Plant Evolutionary Biology, University of Tennessee • conversation
Dec. 13, 2024 ~9 min

Rain may have helped form the first cells, kick-starting life as we know it

The earliest cells likely didn’t have membranes to separate and protect their components and chemistry away from a harsh surrounding environment. But they may have made do with rain.

Aman Agrawal, Postdoctoral Scholar in Chemical Engineering, University of Chicago Pritzker School of Molecular Engineering • conversation
Oct. 15, 2024 ~12 min

Female giraffes drove the evolution of long giraffe necks in order to feed on the most nutritious leaves, new research suggests

Giraffe necks are a hot topic among biologists. A new study contradicts an older theory that says male giraffes need long necks to fight over mates.

Douglas R. Cavener, Huck Distinguished Chair in Evolutionary Genetics and Professor of Biology, Penn State • conversation
June 5, 2024 ~7 min

City mouse or country mouse? I collect mice from Philly homes to study how they got so good at urban living

An evolutionary biologist is studying what these resilient urban pests can teach us about adaptation and evolution.

Megan Phifer-Rixey, Assistant Professor of Biology, Drexel University • conversation
March 14, 2024 ~7 min


Rare access to hammerhead shark embryos reveals secrets of its unique head development

Because hammerhead sharks give birth to live young, studying their embryonic development is much more complicated than harvesting some eggs and watching them develop in real time.

Gareth J. Fraser, Associate Professor of Evolutionary Developmental Biology, University of Florida • conversation
March 8, 2024 ~5 min

Lizards, insects and other species are evolving with climate change, but not fast enough

From dark dragonflies becoming paler to plants flowering earlier, some species are slowly evolving with the climate. Evolutionary biologists explain why few will evolve fast enough.

James Stroud, Assistant Professor of Ecology and Evolution, Georgia Institute of Technology • conversation
Nov. 21, 2023 ~10 min

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