John Murray Spear said the spirits told him how to create a perpetual motion machine. But things didn't go quite according to plan.

INVENTIONS
Thank him for making tasty frozen pizza a reality.
An ingenious way to take aerial photos.
Even its inventor was worried about calling it a "lie detector."
Horse-powered cars, bombs with cat flaps, self-steering golf balls: Arthur Paul Pedrick may not have been the world's most successful inventor, but he was undoubtedly one of the most creative.
The glass armonica was Benjamin Franklin's biggest contribution to the world of music—and then it started to kill people.
His invention saved <em>Titanic</em> passengers.
Michael Faraday's formal schooling was limited, but his work as a bookbinder allowed him to learn about chemistry, physics, and a mysterious force called "electricity."
As a teenager, Chester Greenwood of Farmington, Maine, had sensitive ears and a creative imagination.
The actress invented a technology that would become the basis for Wi-Fi, but it wasn’t until 1990 that her accomplishments were recognized—which is the subject of a new documentary.
They're now more than a year old.