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A grain of sand is very small and completely harmless. It consists of tiny crystals of the mineral quartz and is quite durable. But what would happen if such a grain traveled at the speed of light and hit our planet? Would it be able to damage it? Or would it be destroyed before reaching the surface of the Earth? #brightside https://brightside.com FACEBOOK https://business.facebook.com/Brightside-S... Bright Side / brightside-side-104251721126053 Music: Epidemic Sound https://www.epidemicsound.com/ The materials used (photos, videos and more) come from: https://www.depositphotos.com https://www.shutterstock.com https://www.eastnews.ru ___________________ Subscribe to the Bright Side https://bit.ly/2n9VrJj