He foresaw the use of ball bearings, he designed a parachute not unlike those in use today; he had an idea for a diving suit, and he envisioned a machine he called “the aerial screw,” which with a few tweaks, four centuries later, became the modern-day helicopter. But most of all, he painted the Mona Lisa.
Had Leonardo da Vinci lived longer than 67 years, he might have foreseen electricity, the Internet and had some iDeas about the iPad. And who knows, he may have shouted Yahoo! to make Mona Lisa smile.