Topic: Indianapolis Zoo
Rodney Jackson and his team take 20 to 30 yaks, each loaded with 250 to 300 pounds of gear, into the Himalayas to study snow leopards, which take the word 'elusive' to an extreme.
'We know the answer to what it takes to save' polar bears, says environmental prize winner Steven Amstrup, who has gone to the Arctic to study the bears for 30 years.
Laurie Marker cuts down thorn bushes and gets farmers to change from herding dogs to guard dogs to protect cheetahs.
For four decades Iain Douglas-Hamilton has been an advocate for elephants, the endangered giants of Africa.