(smooth music) (birds chirping) A safe well-furnished den is a ... The animals also lower their body temperature down to about 40 degrees plus . They survive on their bodies' storage of fat ...

I’m a biologist who studies marmot behavior ... an extraordinary adaptation that permits animals to massively slow their metabolism and live off their fat the entire winter.

The use of animal fat in biodiesel has increased by forty times since 2006, and demand is set to triple by 2030 compared to 2021, according to the study by green campaigners Transport and ...

About 8,800, according to one estimate. Using animal fat to produce greener aviation fuel has been embraced as a potential solution for curbing carbon emissions. In the European Union, the amount ...