SHEFFIELD STORM: Here are 7 facts about lightning that you will not believe
Last night's violent storm in Sheffield brought a deluge of rain and a spectacular lightning display.
Here's a quiz featuring some of the best photos sent in to the Star.
Fact 1 is from the TV documentary channel, Eden.
Facts 2 to 5 are from the researchers behind the BBC One programme, QI.
Facts 6 and 7 are from the USA’s National Oceanic and Atmospheric Administration.