Christkind

The macro world as we know it is governed by Newton’s laws of motion and gravity - what goes up, must come down.

But a team of physicists from Columbia University have put forward a theoretical paper that turns this idea on its head. They say there might actually be particles with negative mass - which under gravity, move up, instead of down - and they’re all around us.

According to their paper, it’s not any weird subatomic particle that has these properties, but the particles of sound we hear and produce every day - phonons - that are rebelling against the force of gravity.

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