A 500-year-old notebook written in by Leonardo da Vinci has gone on display at a museum in Washington.<br /><br />The "Codex on the Flight of Birds" details da Vinci's thoughts on how humans could emulate birds flying.<br /><br />Although written 500 years ago, many of his theories and equations are the same as those used in modern flights.<br /><br />...<br />http://www.euronews.net/
