100g of brazil nuts have twice the radiation of a dental xray

100g Brazil nuts = 0.01  mSv

Dental x-ray = 0.015 mSv

Daily average exposure to radiation (UK) = 0.007 mSv



There is no offical football pitch size

Football (soccer) pitches are all different sizes. There are only minimum and maximum lengths:

Min length: 90m  —  Max length: 120m

Min width: 45m — Max width: 90m

The length must be longer than the width. So theoretically you could have a pitch that’s 90m x 89m.

One of the longest pitches is Hull’s KC Stadium Hull City AFC at 114 metres


Before alarm clocks Knocker-Uppers stayed up all night and tapped on people’s windows to wake them up

Originally they used to knock on people’s doors but realised that they were creating such a commotion that some neighbours got woken up for free, so over time they changed their approach and lightly tapped on the upstairs bedroom window with long sticks or used peashooters.

Watch a video of a knocer-upper here: