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  • Courtship in Drosophila

    Various courtship songs produced by Drosophila species

  • Archaea

    Haloferax volcanii motility mutants stab-inoculated on a 0.3% agar motility plate. The “halos” and “rings” likely reflect the motility of this archaeon following gradients of attractant or repellent chemicals. 

  • Bacterial Respiratory Complex

    Structural model of a bacterial respiratory complex III: remember that when you respire, your complex III perspires to produce your body's energy.

  • Sea Anemone

  • Larix siberica

    Siberian Larch, taken at our field site near Lake Khovsgol in north-central Mongolia.  We are analyzing tree-ring width and stable isotopes of the tree rings to reconstruct climate, and Larch responses to climate change, over the past century as the temperature in Mongolia has risen.  

Biology is fundamental to our changing world. The 21st century challenge for our students, our scholars, and the greater society is to understand our place in this changing world and to create fundamental knowledge for informed policies, economies, and social structure.

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Upcoming Events



Evolutionary dynamics of cooperation via indirect reciprocity

Dr. Taylor Kessinger, Penn Postdoctoral Researcher
- | Leidy Room 10

Abstract: We live in a society. Societies depend on cooperation between unrelated individuals who have little prospect for repeated interactions––and thus little clear incentive to cooperate. How can we resolve this…



Seminar with Paul Atzberger

Paul Atzberger, University of California Santa Barbara
- | Online Only


Mechanisms of climate change resilience in reef-building corals

Dr. Katie Barott, University of Pennsylvania
- | Leidy Room 10

Abstract:

Environmental variability is predicted to promote stress tolerance by selecting for phenotypic plasticity. However, the influence of environmental variability (e.g. diel fluctuations in seawater…