Greg Kahn

Inside every tree is a timeline.

What looks like a simple pattern of rings is actually a living archive recording fire, drought, insect outbreaks, saltwater intrusion, and shifting climate year by year. Through dendrochronology, scientists can read centuries of ecological change written in wood.

Inside every tree is a timeline.

What looks like a simple pattern of rings is actually a living archive recording fire, drought, insect outbreaks, saltwater intrusion, and shifting climate year by year. Through dendrochronology, scientists can read centuries of ecological change written in wood.

History in the Rings A tree’s rings can tell a much deeper story than just the number of years it has lived.

Tree rings form a natural archive, recording fire, drought, insects, saltwater intrusion, and climate year by year. Across the U.S., dendrochronology reveals the secrets trees hold. My latest project in Nature Conservancy Magazine

www.nature.org/en-us/magazi...

Reading the Tree Rings Tree rings can reveal evidence of rainy years, periods of drought, bug infestations, forest fires and even volcanic eruptions.

“I try to bridge the gap between papers, charts, and data, and then show it visually in rings and real-life scenes.”

blog.nature.org/2026/02/04/r...

Reading the Tree Rings Tree rings can reveal evidence of rainy years, periods of drought, bug infestations, forest fires and even volcanic eruptions.

“I try to bridge the gap between papers, charts, and data, and then show it visually in rings and real-life scenes.”

blog.nature.org/2026/02/04/r...

History in the Rings A tree’s rings can tell a much deeper story than just the number of years it has lived.

Tree rings form a natural archive, recording fire, drought, insects, saltwater intrusion, and climate year by year. Across the U.S., dendrochronology reveals the secrets trees hold. My latest project in Nature Conservancy Magazine

www.nature.org/en-us/magazi...

Thank you Leah, that means so much coming from you

New work: Congresswoman Sarah McBride for The New Republic.

“I didn’t run for the United States House of Representatives to talk about what bathroom I use,” McBride told host Margaret Brennan. “I didn’t run to talk about myself.” She ran, she said, to “deliver for Delawareans”

Thanks so much, Drew!

Man reflected in mirror in dark and moody lighting

New work for The Wall Street Journal: A deep dive into how many on Wall Street turn to Adderall and Vyvanse to power through grueling hours and stay ahead in a high-stakes, high-pressure environment.

Man dressed as Edgar Allan Poe standing at Poe’s grave in Baltimore in the night

Dressed as Edgar Allan Poe, David Keltz sits at his usual table in Baltimore’s Annabel Lee Tavern, reflecting on 30+ years portraying the literary icon. “I read my first Poe story at 13 and knew I wanted to be an actor,” says Keltz, now 79.

Older weightlifter holding bar vertical in front of kettle bells in gym

At 76, Manny Rechthand holds 12 American powerlifting records in his age and weight class. “I don’t know how many years I have left, but I wasn’t going to spend them chasing money, big cars, and a fancy house.” he says.

New work for the Financial Times, exploring the complex story of Three Mile Island. This piece delves into the potential restart of the nuclear plant and the lingering questions it raises for the community of Elizabethtown, Pennsylvania.

North Carolina's Segregation Academies are benefiting from rapidly expanding and controversial voucher-style programs.

@jenniferberryhawes.bsky.social & @mrsimon22.bsky.social report, with photography by @gregkahn.bsky.social for @propublica.org www.propublica.org/article/segr...

New cover for TIME: I recently was able to spend time making portraits of Senator John Fetterman for a story by Molly Ball on his recovery from depression.

Loved meeting Patty and Doris and collaborating for this portrait for the @washingtonpost.com https://www.washingtonpost.com/opinions/2023/05/09/doris-jean-cammack-equal-rights-activism-travel/