These extra fat stores help maintain their body heat. (babygaga.com)
Brown fat is important in maintaining body heat in cold climates, but hypothyroidism prevents it from doing its job (9). (healthline.com)
Previously, says Xu, most scientists presumed that large dinosaurs — like many of today's large animals, such as elephants and rhinos — didn't need insulation because their immense bulk helped them efficiently maintain body heat. (sciencemag.org)