Polar Bear Fur and Black Skin: The Physics of an Arctic Coat
Polar bear fur is transparent, not white. Their skin is jet black. The physics of how they stay warm and why the fibre-optic fur myth was debunked.
All articles tagged with "Physiology"
Polar bear fur is transparent, not white. Their skin is jet black. The physics of how they stay warm and why the fibre-optic fur myth was debunked.
Polar bear speed: 40 km/h sprint, 10 km/h swimming, and the 687 km continuous-swim record. Why they overheat in seconds, and how they hunt despite it.
Grizzly bears hibernate 4-7 months, dropping heart rate to 8-19 bpm while females give birth mid-sleep. The physiology, the den, and climate disruption.
Scandinavian brown bears hibernate 6-7 months; Romanian bears 4-5. Heart rate drops to 8 bpm, females give birth mid-sleep. Physiology, dens, climate effects.