Follow any links at Beyond Books for information about Leonardo da Vinci and also check out these links. Both Worlds. The next links are a few drawings that represent his sensitivity and scientific eye. Sensitivity and his Scientific Eye.
Those are 3 separate links the last one showing da Vinci's drawing of a flying maching or what appears to be the beginning of a helicopter. And this last link is a timeline of HIS LIFE. The last link has many options but look at his life and then if you're curious look at the other liinks.