Google+

BBC Future

Head Squeeze

How long can you go without sleep?

There is no doubt that shut-eye is essential for humans. But how much do you need, what is it for and what happens if you don’t get enough?

James May delves into the mysteries that still surround a good night’s sleep.

For more videos subscribe to the Head Squeeze channel on YouTube.

If you would like to comment on this video or anything else you have seen on Future, head over to our Facebook page or message us on Twitter.