Wrapped around your gut is a web of hundreds of millions of nerve cells that can run digestion on its own. So why is your gut called your "second brain", and is it really talking to your mind? This animated explainer separates what science has shown from what is still early research.

Chapters:

0:00 Intro

0:17 The brain in your belly: the enteric nervous system

1:26 The gut that works alone: peristalsis

2:41 The phone line: the vagus nerve

3:53 The "happy chemical": serotonin in the gut

4:56 Butterflies in your stomach

5:56 Trillions of tenants: the gut microbiome

7:01 Mice, microbes and moods

8:08 What we know in humans

9:08 So, is it a brain?

• Real studies cited on screen (author, journal, year), with mouse and early research clearly labelled

• English AI voiceover

• Original synthesized music and sound effects, mixed to -14 LUFS

• Original vector animation in a clean neon style, 1080p at 60 fps

• Fact-checked script; educational only, not medical advice

The hidden science of your body, explained in ten minutes.