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========== [MUSIC] Thank you to 23andMe for supporting PBS Digital
Studios This is Harrison. Harrison’s favorite hobbies include pooping,
peeing, not sleeping, and costing me a fair amount of money. Not exactly the number one qualities you go
looking for in a friend. Yet, I knew he was the world’s most perfect
human the instant I laid eyes on him, I knew I’d give up everything I have for him, even
my life, without hesitation. All of that, even though just a few months
ago, we’d never even met. The reason why? Evolution, of course. [MUSIC] Staying alive long enough to have healthy
offspring, and getting our traits from one generation to the next is how we win the big-picture
game of evolution. It’s kind of the whole point. Some traits, whether it’s being ...