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Understanding the climate record through objects
Melissa Charenko stands in front of art in her office.

In her office, Melissa Charenko has paintings by artist Jill Pelto that depict the kind of climate proxies Charenko writes about in her new book, such as sediment cores containing pollen grains.

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Understanding the climate record through objects

Melissa Charenko’s new book shares the history of how 20th-century scientists used climate “proxies”—such as tree rings and fossil pollen—to understand past climates, which has implications for future climate action.

3 min. read

Letting the sunshine in and monitoring stormwater runoff
Tree saplings next to the solar panels.

Trees planted next to the solar panels are enhancing stormwater runoff infiltration.

(Image: The Water Center at Penn)

Letting the sunshine in and monitoring stormwater runoff

As the buzz around renewable energy grows louder, a research endeavor led by the Water Center at Penn exemplifies of how addressing energy demands goes hand-in-hand with tackling water challenges.

From the Environmental Innovations Initiative

2 min. read

A massive chunk of ice, a new laser, and new information on sea-level rise
A researcher walking through a glacier in Greenland.

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A massive chunk of ice, a new laser, and new information on sea-level rise

For nearly a decade, Leigh Stearns and collaborators aimed a laser scanner system at Greenland’s Helheim Glacier. Their long-running survey reveals that Helheim’s massive calving events don’t behave the way scientists once thought, reframing how ice loss contributes to sea-level rise.

5 min. read

Two Penn faculty elected American Physical Society Fellows
Ritesh Agarwal and Doug Jerolmack.

Ritesh Agarwal (left), Srinivasa Ramanujan Distinguished Scholar in Materials Science and Engineering, and Douglas Jerolmack, Edmund J. and Louise W. Kahn Endowed Term Professor of Earth and Environmental Science and professor of mechanical engineering and applied mechanics.

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Two Penn faculty elected American Physical Society Fellows

Ritesh Agarwal of the School of Engineering and Applied Science and Douglas Jerolmack of the School of Arts & Sciences and Penn Engineering have been elected by their peers in recognition of their contributions to the field.

2 min. read

Inspiring interest in water quality at Cobbs Creek
Two people in waders in Cobbs Creek getting water samples.

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Inspiring interest in water quality at Cobbs Creek

Faculty and staff, high school and Penn students, and community members are working together to collect and analyze the most detailed water quality data to date at the West Philadelphia stream.

4 min. read

Joseph Francisco awarded 2025 Pauling Medal

Joseph Francisco awarded 2025 Pauling Medal

Joseph Francisco, President’s Distinguished Professor of Earth and Environmental Science, is awarded the Pauling Medal in honor of his work into the chemistry of Earth’s atmosphere by the American Chemical Society Puget Sound Section.

Students use machine learning to track and protect whale populations
Chinmay Govind writing equations on a chalkboard.

Chinmay Govind, a rising second-year in the School of Engineering and Applied Science, writes equations on a chalkboard in his team's research space at David Rittenhouse Laboratory. For his portion of the PURM project, Govind used AI to track and map whale locations.

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Students use machine learning to track and protect whale populations

For their Penn Undergraduate Research Mentoring Program project, Chinmay Govind and Nihar Ballamudi leveraged AI to locate and census whales. The study may inform policy measures that help to improve protections for whale populations worldwide.

5 min. read

Could exoplanets locked in eternal day and endless night support life?
Artist depiction of exoplanet LHS 3844 b.

Image: Courtesy of NASA

Could exoplanets locked in eternal day and endless night support life?

Ever so slightly bigger than Earth, the exoplanet LHS 3844b orbits its parent star, LHS 3884, a red dwarf 48.5 light-years away from our solar system, in such a way that the speed of its axial spin mirrors the speed of its orbit. The result? One side of LHS 3844b is perpetually bathed in scorching sunlight, locked into a never-ending, blistering hot day, while the other is forever shrouded in darkness so cold that particles are incapable of movement, a state known as absolute zero (zero Kelvin).

7 min. read