Up Next
Back to Show
Nature
What is the Arctic Death Spiral?
The Arctic “death spiral” refers to the rapid loss of sea ice caused by climate change. For walruses, this means losing the ice platforms they rely on to rest, raise their young, and hunt. Discover how melting sea ice is reshaping their future.
Support Provided By
Unlock with PBS Passport
52:58
The explosion of dog types into the roughly 400 breeds and dogs' role in medical care.
Unlock with PBS Passport
52:59
This film explores how the domestication of dogs might have taken place.
Unlock with PBS Passport
52:59
No spider can escape the tireless pursuit of Martin Nicholas.
Unlock with PBS Passport
54:19
It's one of the most brutal environments on Earth - so how does life carry on here?