The surface of hot water freezes faster than cold water but the rest of the water will remain liquid longer than in a cold sample.

Liquid air looks like water with a bluish tint.

Industrial hemp contains less than 1% of THC, the psychoactive component of marijuana.

In a desert, a mirage is caused when air near the ground is hotter than air higher up. As light from the sun passes from cooler to warmer air, it speeds up and is refracted upward, creating the image of water.

Radio waves travel so much faster than sound waves that a broadcast voice can be heard sooner 18,000 km away than in the back of the room in which it originated.

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