The gym bros perfectly demonstrate Foster's Rule! Continental species follow the "bigger is better" playbook, but islands flip the script entirely. On islands, large animals shrink (bye-bye, resources) while small animals become supersized (hello, no predators!). Elephants become pocket-sized and rodents turn into nightmare fuel. Nature's way of saying "location, location, location" determines whether you're bulking or cutting. Darwin would totally use this in his PowerPoint presentations.