Why Ancient Humans Were Terrified of the Dark

Why are we so afraid of the dark? Because for millions of years, the dark was where we died. Our ancestors weren't the hunters. They were the prey. From an eagle that snatched a child nearly 3 million years ago, to leopards that dragged our relatives into trees, to lions that timed their attacks by the moon, this is the dark story of the night, and how it still lives inside your brain today. Why do kids fear the closet and the space under the bed? Why do you sleep badly on your first night in a hotel? Why does a creaking floor at 3 a.m. make your heart pound? The answer is millions of years old.