Win 1 of 5 'Guinness World Records: Science & Stuff' prizes
To celebrate the launch of Guinness World Records: Science & Stuff in the UK, we are giving away 5 exclusive prize bundles, each including a copy of the brand new book and a lab coat!
Fill out the form on the right and answer the question to be in with a chance of winning. (If you don't know the answer, you might find it in the video below...)
The competition closes at 23:00 GMT on Sunday 1 April 2018. The winners will be told via email and we will ask for a postal address so that we can send out the prize.
The competition is open to UK residents only. If you are under 13, please ask an adult to fill out the form for you. Terms and conditions apply.
Fill out the form to enter the competition