In her TEDxPhoenix 11.11.11 TEDxTalk, Lucianne Walkowicz explains the importance of preserving our dark night sky from the perils of light pollution and other lesser-known factors. In Lucianne's eyes, "Our night sky is a natural resource, it's like a park you can visit without ever having to travel there. But like any natural resource, if we don't protect it, if we don't preserve it and treasure it, it will slip away from us and be gone."
Other TED Talks
The title says it all: this blog features physics videos found everywhere on the web: animations, demonstrations, lectures, documentaries.