Quizzes · 7 available · 5–10 min each

Test your brain. No grade.

Short, illustrated quizzes that double as mini lessons. Get it wrong and we’ll tell you exactly why — that’s the lesson, mostly. Every answer comes with a source where the science backs it up.

This week’s quiz

How well do you actually know your brain?

Eight questions across the basics. About four minutes.

Question 1 of 8

Score · 0

Roughly how many neurons does the average adult human brain contain?

More quizzes

Or read a mini lesson →

6 questions · 3 min · Sleep

Sleep, Honestly

Six questions on the biology of being unconscious for eight hours.

7 questions · 4 min · Attention

Your Attention, From the Inside

Seven questions on focus, dopamine, and the device in your pocket.

8 questions · 4 min · Stress

Anxiety: Myth vs. Mechanism

Eight questions on the biology of being on edge.

9 questions · 5 min · Memory

How Memory Actually Works

Nine questions on encoding, sleep, retrieval, and forgetting.

10 questions · 5 min · Neurochem

What's a Real Neurotransmitter?

Ten questions on the chemicals your brain actually uses to think.

6 questions · 3 min · Mood

Mood, In Plain English

Six questions on the biology of feeling.