Extras
In the otherworldly Spiny Forest of Madagascar, a historic release is about to take place.
The Bear River was once a lush area with wetlands, hot springs, and abundant wildlife.
Terry Masear helps rescue baby hummingbird twins whose mother died.
Meet the world鈥檚 first sloth detective dog, Keysha.
Follow a woman鈥檚 transformative journey as she nurtures wounded hummingbirds.
Brand new to science: a sloth drinking water鈥攃aptured cinematically for the first time.
A sloth scientist, her tree-climbing BFF, and their dog work to save Costa Rica鈥檚 sloth populations.
Extreme drought drives animals to behave abnormally, as crocodiles and hippos crowd a waterhole.