That’s not anxiety. That’s evolution.

It’s called the First-Night Effect, and it’s your brain’s way of guarding you. When you sleep in a new environment, one half of your brain stays more alert, monitoring sounds, movements, and potential threats like a built-in night watch.

While one hemisphere dips into deep sleep, the other remains on standby. The result? You wake up feeling like you barely slept and you’re not wrong.

It’s your brain saying, “We’re not home… stay sharp.”

By night two, the effect usually fades. But on that first night? You’re a light sleeper for a reason.

Even in dreams, your brain protects you.

BrainPower #SleepScience #WeirdBiology #FirstNightEffect #MindBlown

Source: Factology