Tap to enable a layout that focuses on the article.
Advertisement

POP QUIZ

How many neurons (nerve cells) does the typical human brain contain?

* See answer, S4

*

POP QUIZ ANSWER:

The typical human brain, which weighs about 3 pounds, has more than 10 billion neurons.

(Question on S1.)

Sign up for Climate | Health | Science

A weekly round-up of the latest in science, health and the environment.

Advertisement
Advertisement