I found my favorite bit from Carl Sagan's Cosmos on YouTube today - eight minutes of Sagan speaking over animation demonstrating 4 billion years of evolution. It's such a simple presentation and it does so much to reinforce the wonder and majesty of evolution on earth. I admire Sagan most for his infectious excitement about science. This little clip from his masterpiece Cosmos is a particularly good example of Sagan sharing one of the universe's many secrets with us and loving it. YouTube.