You don't need a fancy machine, or even ears, to listen to old records. With science educator Sam Haynor's bone-conducting phonograph, you just need your teeth and some cheap everyday objects. Haynor places the record on a DIY turntable and then attaches a needle to a wooden skewer, which users bite. As the needle moves over grooves in the record, vibrations travel up the skewer and into the teeth and jaw. The brain interprets them as sound. Try it yourself, but be warned: Playing music through your skull can feel unsettling. "People give me that 'what are you doing to me?' look," Haynor says.