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What this boils down to is your definition of a sound. Does a tree falling in a forest cause a sound wave? Cool Grinch UCF Knights Christmas shirt yes. A sound wave is vibrations in the air which can be detected by a sentient creature with ears or a microphone. Most people believe that a sound wave and a sound are the same thing. If that’s the case then yes, a tree falling in a forest makes a sound irrespective of whether there is anyone around or not. Now, if you understand the physiology of auditory perception then you will realize that there is more to sound than just the detecting of vibrations in the air. Just grind your teeth if you want proof. That sound you hear has nothing to do with vibrations in the air. The vibrations are traveling through your jawbone. You see, detecting vibrations is just the first part of hearing sounds. Your ears send Cool Grinch UCF Knights Christmas shirt impulses to the brains auditory center where they are interpreted as sounds. These sounds only exist within our brain. So, without a conscious observer, sounds do not exist.
Cool Grinch UCF Knights Christmas shirt
You think man can destroy the planet? What intoxicating vanity. Let me tell you about our planet. Earth is four-and-a-half-billion-years-old. There’s been life on it for nearly that long, 3.8 billion years. Bacteria first; later the first multicellular life, then the first complex creatures in the sea, on the land. Then finally theCool Grinch UCF Knights Christmas shirt sweeping ages of animals, theCool Grinch UCF Knights Christmas shirt, the Cool Grinch UCF Knights Christmas shirt, at last the mammals, each one enduring millions on millions of years, great dynasties of creatures rising, flourishing, dying away — all this against a background of continuous and violent upheaval. Mountain ranges thrust up, eroded away, cometary impacts, volcano eruptions, oceans rising and falling, whole continents moving, an endless, constant, violent change, colliding, buckling to make mountains over millions of years. Earth has survived everything in its time. It will certainly survive us. If all the nuclear weapons in the world went off at once and all the plants, all the animals died and the earth was sizzling hot for a hundred thousand years, life would survive, somewhere: under the soil, frozen in Arctic ice. Sooner or later, when the planet was no longer inhospitable, life would spread again.