Support Provided By
Unlock with PBS Passport
54:41
Examine a radical experiment to train crocs to pair the sound of a bell with a shock.
Unlock with PBS Passport
55:11
Inspect a warning system to deter bears and a controversial experiment to keep them away f
Unlock with PBS Passport
55:11
Mark Evans tries to find non-lethal solutions to keep people and sharks safe.
0:31
Namibia’s Chobe River is known as the crocodile attack capital of the world.
0:31
Inspect a warning system designed to deter bears to keep them away from town. Airs 9/3.