With Halloween coming up this weekend, it seemed like the perfect time to discuss a problem far too many of us face—homes that are haunted by evil spirits.These gadgets can confirm you are not completely crazy.
Nikola Tesla's Spirit Radio is built with a simple crystal radio circuit, but it has the ability to generate spooky sounds from all kinds of electromagnetic interference. Some, like Tesla himself, believed that it had the power to pick up on supernatural forces. It actually creeped him out:
"My first observations positively terrified me as there was present in them something mysterious, not to say supernatural, and I was alone in my laboratory at night."
- Nikola Tesla 1901