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Every World Cup, Adidas introduces a new ball, and this year’s is called the Al Rihla. Joern Pollex/FIFA via Getty Images

World Cup: This year’s special Al Rihla ball has the aerodynamics of a champion, according to a sports physicist

Adidas releases a new ball for every World Cup. At the highest level of play, a ball that behaves in unexpected ways can throw players off. A sports physicist explains the science of this year’s ball.
Open windows and doors to boost air flow and help remove airborne particles. Daniela Torres/EyeEm via Getty Images

Keeping indoor air clean can reduce the chance of spreading coronavirus

Being indoors with other people is a recipe for spreading the coronavirus. But removing airborne particles through proper ventilation and air filtration can reduce some of that risk.

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