Which scientist discovered the radioactive element radium?

The pacemaker is an electrical device that regulates the heartbeat.

The scanner reads the bar code label on something at a supermarket, and translates it into a number which the computer reads.

The IEEE (Institute of Electrical and Electronics Engineers) was formed in 1963 by the merger of the Institute of Radio Engineers (IRE, founded 1912) and the American Institute of Electrical Engineers (AIEE, founded 1884).

The first blue jeans were invented by tailor Levi Strauss, who invented tougher working pants for the miners of the California Gold Rush.

Zworykin invented both the tube (iconoscope) for transmission and the receiver (kinescope) in 1923 and 1924, respectively.

Various authors have credited the invention of the thermometer to Cornelius Drebbel, Robert Fludd, Galileo Galilei or Santorio Santorio. The thermometer was not a single invention, however, but a development.

Galileo Galilei also discovered that objects (glass spheres filled with aqueous alcohol) of slightly different densities would rise and fall, which is nowadays the principle of the Galileo thermometer (shown). Today such thermometers are calibrated to a temperature scale.

Leo Hendrik Baekeland invented the first plastic called Bakelite.

Grigg, who was from Missouri, originally named his creation 'Bib-Label Lithiated Lemon-Lime Soda'.