Tannis Davidson, Head of Zoology and Science collections at the Grant Museum of Zoology in London, explains the differences of cat skulls inside a display case at the Museum, in London on June 26, 2026. As visitors peered at the skeletons and preserved animals at a London zoological museum during the latest heatwave, staff were focused on a different attraction: a computer screen glowing with red and green temperature indicators. With each one linked to a sensor in a different display case, the system allows staff to see when an exhibit is in danger of overheating. (Photo by CARLOS JASSO / AFP via Getty Images) / TO GO WITH AFP STORY BY HELEN ROWE