We humans tend to consider ourselves apart from other species. But we’re not really so different. So what makes us unique? I’d say it’s language, though not everyone would agree. Some people insist it’s our large brains, but dolphins have proportionally larger brains than we do. Some still contend our opposable thumbs set us apart, but koalas have two thumbs on each hand.

The answer, then, is… language. We uniquely have the ability to communicate complex and abstract ideas. More >>