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1:57
Tony Sinclair arrived in the Serengeti in 1965, looking to study the wildlife.

5:22
Jim Estes tries to figure out what caused the collapse of a once-thriving kelp forest.

1:24
See how monitoring lilac blooms indicates the start of spring.

1:45
See how this group of 4th graders became citizen scientists.

1:38
A group of elephants takes offense when a pride of lions kills a buffalo.

10:00
Dereck and Beverly Joubert take us behind the camera for the filming of the final episode.

2:51
Dr. Natalia Borrego works with lion whisperer Kevin Richardson to carry out lion IQ tests.

2:43
Like so many other wild cats, survival of the tiger is on a knife edge.

2:36
Watch as a caregiver feeds a joey who was rescued from the wildfires.

2:03
A baby wombat was saved from the devastating Australian fires.

3:26
A carer carefully attempts to save one of Australia's venomous snakes, the Tiger snake.

3:04
Caregivers watch over a young lorikeet visibly traumatized by the Australian wildfires.