There would be more stringent monitoring procedures and minimum standards for people who work in the animal experiment sector.

BBC: Animal welfare laws

Initial results were positive, and Estess approached Rothstein at Johns Hopkins, one of the world's leading experts in ALS, to help design an animal experiment to pave the way for human trials.

FORBES: Gene Therapy Slows A Killer

Another failed experiment with elephants involved the mirror test a classic evaluation of whether an animal recognizes its own reflection.

WSJ: The Brains of the Animal Kingdom