Sam Horwitz had never felt so excited. The Grand Hall of the New York Natural History Museum was packed with hundreds of people, all clutching invitations to 'See the New Wonder of the World'. In exactly two minutes, Sam was going to step out and show them his amazing discovery. Sam fidgeted with his new white blazer. He'd never worn anything so bold before, but for this, the biggest day of his life, he wanted to impress.