Actually, I've omitted the MOST interesting fact about the program, and Cap's comment reminded me of it...crocs having survived for so long:

Crocodile blood is unbelievably aggressive in fighting all kinds of bacteria and viruses. The program dealt with a researcher who was determined to have some top minds investigate croc blood to begin to discover its limitations.

Problem was: Tame croc blood has too high of a fat content, thereby not breaking down adaptably for chemical research. So, researcher #1 (a croc specialist) had to go into the wilds to get wild croc blood (i.e., not loaded with fat).

Problem was: That blood was not picked up at the airport in a timely fashion, so it went back. Back into the wilds went croc. specialist #1.

After working with several crocodiledundeetypes, specialist #1 did finally get an ample supply (two, in fact) to the blood specialist and a certain protein was isolated that was able to fight infectious bodies that human blood is powerless against. I suppose if that protein can somehow be articifically manufactured, we may see in the not-so-distant future a chemical bastion with which we humans can more effectively fight disease. I wish I could remember the name of the protein; its newly-given name is 'croco*' something or other.