Life Beneath an Antarctic Ice Sheet
Before you drift: Did you know your brain paralyses your body every night so you don't act out your dreams? And that's just the start.
Every night, your brain runs a carefully choreographed sequence. Stage 1 drowsiness gives way to deeper sleep, where your body repairs tissue and your immune system strengthens. Then comes REM (rapid eye movement), the strange, vivid theatre where dreams unfold. During REM, your brain is almost as active as when you're awake, yet your muscles are temporarily paralysed so you don't act out the scenes playing in your mind.
Sleep isn't nothing. It's an intensely active state. Your brain is consolidating memories, regulating emotions, clearing out cellular waste through the glymphatic system, and even rehearsing skills you practised that day. Tonight we trace all of it, step by step, from the first moment your eyelids grow heavy to the last dream before dawn.
What you'll learn
- How microbes survive without sunlight or organic food
- Why REM sleep paralyses your body, and what happens when it doesn't
- Why Antarctic ice is a window into Europa's ocean
- How we drill through 3 kilometres of ice without contaminating the lake below