Recently discovered wax cylinders have been shown to contain what could be the earliest audio recordings of Christmas in the world. The Museum of London discovered 24 wax cylinders dating back to 1902 that contain a British family's home phonograph recordings taken at Christmas. The recordings are considered incredibly rare because wax cylinders are fragile. They are made of wax after all, and as such they don't store very well. Finding them over one hundred years later in playable condition is a Christmas miracle of science.
The BodyGuard, designed by cameraman David Brown, is an armored glove equipped with a high voltage stun gun, laser pointer for aiming, video camera and flashlight. Brown developed the concept for the BodyGuard -- which is designed to prevent violent situations rather than end them -- one night in 2004 when he and a few of his friends were discussing a recent mountain lion that attacked some cyclists, leaving one dead and the other maimed.
When using a knife, gun, or other handheld weapon, Brown felt the item could be easily dropped, thus leaving the wielder unable to protect his or herself. So, he came up with the glove concept because he felt it would be more difficult to lose the weapon, but also because using one's own hand was much more instinctual than using a foreign object.