You can test for a two way mirror by putting your fingernail on the surface, if there's space between the tip and the image, then its a normal mirror, if not, its two way.

Next 5 Fascinating Facts

• A fingernail or toenail takes ...
• Your fingernails can turn yellow ...
• Fingernails grow nearly 4 ...
• A Holstein's spots are like a fingerprint or ...
• The muzzle of a lion is like a fingerprint ...

Previous 5 Fascinating Facts

• Blue and fin whales can create the loudest sound by animals ...
• Fin whales are the second largest animal ever to live on earth. ...
• Two normal kidneys contain 2 million tiny blood ...
• It took over 4 years to film milo and otis to ...
• Penny Marshall was the first woman film director to have a film take in more ...