Why Do You Still Wake Up at Every Sound at Night?

Last night, something woke you — a creak, a click — and your heart was pounding before you even opened your eyes. That isn't anxiety. It's a survival system millions of years old, and it never clocked out. For almost all of human history, sleep was the most dangerous thing you could do. Your ancestors slept on open ground, in the dark, surrounded by lions, hyenas and leopards. We uncover how they survived it — fire, sleeping in guarded groups, the "sentinel" night watch, and a brain that never fully switches off — and why that same ancient guard still jolts you awake at 3 a.m. in a locked, safe room. Subscribe, and question the obvious. #evolution #psychology #sleep #survival #whywearelikethis