BBC Sport - Day-night Test cricket: What is the pink ball all about?

What is cricket's pink ball all about?

English cricket takes a step into the dark on Thursday with the first day-night Test played in the country as Joe Root's side face West Indies.

The BBC's sport correspondent Joe Wilson takes a look at the pink ball that will be used at Edgbaston.

READ MORE: England v West Indies: Edgbaston set for UK's first day-night Test

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