Season 01
Season 44
Season 45
Season 46
Season 47
Season 48
Season 49
All Episodes - S49
EPS01
Long-frozen permafrost is melting. How does the resulting release of methane affect us now and what will be the future effects?
EPS02
Scott Burnett is "Scatman"- an Australian ecologist on the trail of the secrets of poop. By identifying and analyzing animal scat for DNA and hormones, he discovers essential details of their behavior and how to protect them.
EPS03
A unique site in southern England preserved rare traces of ancient ice age mammoths and Neanderthals; host David Attenborough.
EPS04
An inventor of bionic limbs, Hugh Herr, works with an injured climber and a surgeon to test a new amputation technique that allows prosthetic limbs to move and feel like the real thing.
EPS05
Three women enroll in trials at the University of Wisconsin in hopes of finding a cure for Alzheimer's disease.