As daylight fades into amber twilight, millions of people experience an unexplainable heaviness that neuroscientists now trace to primal survival mechanisms so deeply embedded in our DNA that our bodies still respond to darkness the same way our ancestors did when predators hunted at night.
There’s something about that particular hour when the sun starts its descent and the sky turns amber-gold. Even on my best days, when everything has gone right, I’ll find myself standing at my kitchen window watching the light fade and feeling this i... [6816 chars]