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What is Sound?

When you are listening to music or talking with your friends, have you ever wondered how you hear these sounds? What is sound, exactly? Well, sound is a vibration that travels through the air and into our ears, but that's not all. Sound has some pretty interesting properties. For example, did you know that there is no sound in space? Sound also has a speed limit and humans have traveled past the speed of sound to create a sonic boom.

What else is there to know about sound? Find out in this fun video by science blogger, Kat Hamill.

For more illuminating science videos, check out Science World's YouTube channel.