30-Second Experiments

The peripheral vision reflex test is one of the fastest ways to measure how quickly your brain reacts to movement […]

Your heart rate changes every time you breathe — literally every single inhale and exhale.Your nervous system adjusts your pulse

Your brain receives two completely different images every second — one from each eye.But you never notice this.Instead, your brain

Your nervous system works at incredible speed — much faster than your conscious brain.And one of the simplest ways to

Your nervous system works at incredible speed — much faster than your conscious brain.And one of the simplest ways to

Most people believe the only way to measure your heart rate is by placing fingers on your neck or wrist.But

Your skin reacts faster than almost any part of your body — and you can prove that in just 20

Your eyes are constantly working together, but you rarely use them individually.This simple one-eye focus test reveals how each eye

You don’t need a stethoscope, smartwatch, or medical device to hear your heartbeat.Your own body can reveal your pulse in

Step 1 — The Quick Experiment Grab a piece of fruit — a slice of apple, a grape, or even