Humans are innately curious creatures. But have you ever wondered why?
Astrophysicist Mario Livio has. And now, he explores this question in a new book, "Why? What Makes Us Curious."
“I chose this particular word, ‘why,’ because this particular question is uniquely human,” Livio says. “Other animals are curious, but only humans are worried and curious about reasons and causes for things. Only humans really ask the question, ‘Why?’”