Chapter
Clips
The teeth of grizzly bears can be used to determine their age through counting annuli or yearly growth rings, which can be seen in finely sectioned teeth.
07:35 - 12:07 (04:32)
Summary
The teeth of grizzly bears can be used to determine their age through counting annuli or yearly growth rings, which can be seen in finely sectioned teeth. This is despite grizzly bears feeding extensively on caribou calves, whose blood stains their teeth.
ChapterThe Biology of Grizzly Bears
Episode#383: Mike Phillips — How to Save a Species
PodcastThe Tim Ferriss Show
Gray wolves were on the brink of extinction when Doug Smith started working on wolf recovery in 1980, and he has been involved nearly every day since then.
12:07 - 15:08 (03:01)
Summary
Gray wolves were on the brink of extinction when Doug Smith started working on wolf recovery in 1980, and he has been involved nearly every day since then. Carnivores, like gray wolves, are always rarer than their prey in natural systems, and Smith was fascinated by the restoration effort for these animals.