This picture is of a tangram puzzle. Tangram puzzles feature 7 pieces which can be put together to form a variety of shapes. It was invented in China before making its way to Europe and the rest of the world. Including the shape below it...

This is a black and white photo of a famous American inventor named Thomas Edison. His many inventions included the practical electric light bulb and phonograph (a device used to play recorded sound).

This concise site provides a brief discussion of the invention of the first work spectroscopes and their impact on forensic science.

This concise site provides a brief discussion of the invention of the first work spectroscopes and their impact on forensic science.

This concise site provides a brief discussion of the invention of the first work spectroscopes and their impact on forensic science.

This concise site provides a brief discussion of the invention of the first work spectroscopes and their impact on forensic science.

This concise site provides a brief discussion of the invention of the first work spectroscopes and their impact on forensic science.

This concise site provides a brief discussion of the invention of the first work spectroscopes and their impact on forensic science.

This concise site provides a brief discussion of the invention of the first work spectroscopes and their impact on forensic science.