Postdocs

A section of healthy human gum tissue captured using an imaging technique called Second Harmonic Generation microscopy. In this sample, collagen fibers (shown in yellow), which give healthy gums their firm, resilient stiffness, are dense and well-organized—acting as a supportive scaffold for the surrounding cells (shown in teal).

(Image: Hardik Makkar)

Image: Andriy Onufriyenko via Getty Images

To visualize the nanoscale structures, the Tertuliano lab often uses large-scale models like the one pictured.

(Image: Sylvia Zhang)

Image: Christian Petersen via Getty Images

Karen Reivich, director of training programs at Penn’s Positive Psychology Center, facilitating a resilience workshop.

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Image: seb_ra via Getty Images

Image: Sciepro/Science Photo Library via Getty Images

High-speed laboratory images capture two distinct “sandball” shapes formed when raindrops strike dry, sloped sand and roll downhill. (Top) Peanut-shaped sandballs, where grains coat the surface of a liquid core. (Bottom) Donut-shaped sandballs, which densify into rigid, wheel-like structures with a hollow center, enabling far more efficient sediment transport than splash erosion alone.

(Image: Daisuke Noto)

Image: Wladimir Bulgar via Getty Images

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