A ball or other object is suspended in the air stream provided by a reversed vacuum cleaner according to the Bernoulli's principle. Place a ball on top of the vacuum cleaner. Turn on the vacuum.

This creates an upward Magnus force, making the ball float and stay in the air longer than expected. The ball can then be kept low over the net and yet still travel far into the opponent's side of ...

In 19th-century France, the young chemist challenged the theory of spontaneous generation and discovered an invisible world ...