We have peculiar relationships with other lifeforms. For instance chalk. Because, if you were a diatom, think how horrified you'd be to discover that billions and billions of the skeletons of your ancestors where being scraped across sidewalks for purposes of hopscotch. Then there's dogs, who have to eat food that's designed to smell good to people. Seriously, if dogs formulated it, dog food would smell like a blend of sun-ripened carp and cat feces. And I just read that researchers have found a promising treatment for multiple sclerosis in mice. Shouldn't we be investing in cures for humans first?