by Heather Shayne Blakeslee
We’ve long debated what makes us human. But as our understanding of other species becomes richer and more complex, brick by brick we’re dismantling the imaginary wall that separates us from the natural world.
We’ve learned that we are not the only species to have verbal language (whales), emotions (cows) or self-awareness (magpies). Other species use medicine (sheep), build housing (beavers), solve math problems (dogs), have social rules and are offended by a lack of fairness (chimpanzees), the latter of which