How can you be tired yet wired? Blame your stone‑age brain

The clock reads 2:13 a.m.

You are exhausted.

Your eyes ache, your body feels heavy, and the alarm is already beginning to loom over the night, yet your brain refuses to let go.

Instead, thoughts arrive in waves.

Did you send that email?

What if you forgot something important?

Perhaps now is also the perfect time for your mind to replay a conversation from 2017 with forensic precision. ...