Thermal cameras detect the heat lost by a subject as infrared radiation. Since polar bears are experts at conserving heat using their thick layer of fat under the skin, heat released by the polar bears are usually undetectable by thermal cameras.
Thermal cameras detect the heat lost by a subject as infrared radiation. Since polar bears are experts at conserving heat using their thick layer of fat under the skin, heat released by the polar bears are usually undetectable by thermal cameras.
