The Adidas World Cup ball is inspired by NASA but it can't last 90 minutes
The Science Behind The World Cup Ball : NPR
The Complete History of the FIFA World Cup™ Ball
The Science Behind The World Cup Ball : NPR
Glossary of association football terms - Wikipedia
Adidas reveals interactive match ball for knockout stages of World Cup
2014 World Cup Has Balls - Men's Journal
Adidas reveals interactive match ball for knockout stages of World Cup
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The World Cup's New High-Tech Ball Will Change Soccer Forever
The Complete History of the FIFA World Cup™ Ball
The Complete History of the FIFA World Cup™ Ball
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World Cup: This year's special Al Rihla ball has the aerodynamics of a champion, according to a sports physicist