CTP_3_Thunberg_glassplate

Photo: Shane Balkowitsch via AP.
This Oct. 8, 2019 photo provided by Shane Balkowitsch shows climate activist Greta Thunberg visiting the Standing Rock Sioux Reservation in Fort Yates, N.D. Thunberg accepted the photographer’s request to pose for the photo using an old technique that involves wetting glass plates with various chemicals before making an exposure. The resulting photographs are being archived at the Library of Congress in Washington and the Swedish History Museum in Stockholm.