Puebla is again seeing dozens of physicists wandering in their streets these days, as researchers from the High-Altitude Water Cherenkov (HAWC) Observatory get together for their biannual collaboration meeting. The Benemérita Universidad Autónoma de Puebla is hosting the meeting this fall, held from October 25 to October 29, in Mexico.
After the sun’s arrival come the planes. The first of the season to reach the South Pole were a pair of Twin Otters, one of which appears parked in the accompanying image. Behind it is a Basler jet—a somewhat larger ski aircraft—shown just as it was landing, a few days later.