Inventors and Scientific Discoveries

Johann Gutenberg invented the printing press with movable type in Mainz, Germany around 1440, revolutionizing communication and knowledge dissemination.

Paul Winchell, a ventriloquist and inventor, patented the first mechanical artificial heart in 1963. His design was implantable in the chest cavity and represented a significant advancement in medical device technology. While Wheatstone and Whitney were inventors in other fields, they were not associated with artificial heart development.

Adolphe Sax, a Belgian instrument maker, invented the saxophone in the 1840s. The instrument is named after him - 'Sax' from his surname. Levi Strauss invented blue jeans, Erno Rubik created the Rubik's cube, and 'None' is incorrect. Sax's invention combined elements of both woodwind and brass instruments.

James Leonard Plimpton patented roller skates in 1863, specifically the quad skate design with four wheels arranged in two pairs. This was a significant improvement over earlier inline designs. Erno Rubik invented the Rubik's cube much later, and John Pemberton created Coca-Cola.

Hans Christian Orsted discovered the relationship between electricity and magnetism in 1820 when he observed that a compass needle deflected near an electric current. This discovery founded the field of electromagnetism. Newton worked in physics earlier, and Paulescu is associated with insulin research, not electromagnetism.

Samuel Morse invented and patented the single-wire telegraph system in the 1830s, along with Morse code for communication. His invention revolutionized long-distance communication. James Naismith invented basketball, and Robert Moog developed electronic musical instruments - neither worked on telegraphy.

Charles Macintosh invented waterproof fabrics in the early 1820s, specifically the rubberized fabric that became known as 'mackintosh' or 'mac.' His invention involved spreading rubber onto fabric to create waterproof material. Whitcomb Judson invented the zipper, and Leeuwenhoek was a pioneer in microscopy.

Elias Howe patented the first practical lock-stitch sewing machine in 1846, which became the foundation for modern sewing machines. Alexander Fleming discovered penicillin (medicine), and Willem Einthoven developed the electrocardiogram (medical device).

John Browning was an American firearms designer who revolutionized modern automatic and semi-automatic weapons, holding 28 gun patents. Louis Braille developed the Braille reading system, and Nils Bohlin invented the three-point seatbelt.

Nils Bohlin, a Swedish engineer at Volvo, invented the modern three-point safety belt in 1959, a design that saved countless lives. Karl Benz developed the first gasoline automobile, and Louis Braille created the reading system for the visually impaired.

Willem Einthoven, a Dutch physician, invented the first practical electrocardiogram (ECG) in the early 20th century and received the 1924 Nobel Prize in Medicine. George Eastman revolutionized photography with Kodak, and Douglas Engelbart invented the computer mouse.

Alfred Nobel invented dynamite in 1867 as a safer alternative to nitroglycerin. His invention led to the establishment of the Nobel Prizes, funded by his fortune from explosives manufacturing. Einstein was a physicist, Archimedes was an ancient mathematician, and option A is definitely correct.

The fluoroscope was indeed an early version of X-ray imaging technology. It was a device that used X-rays to produce real-time moving images of internal structures on a fluorescent screen, paving the way for modern X-ray machines and fluoroscopy equipment used in medicine today.

Walter Hunt invented the safety pin in 1849 and sold the patent for $400 to pay off a debt. Hubert Booth invented the vacuum cleaner, Humphry Davy invented the miner's safety lamp, and James King contributed to early sewing machine development.

In '3 Idiots', Boman Irani played Dr. Viru Sahastrabuddhade, nicknamed 'Virus' by students for his strict, disease-like control over the college. This nickname reflects how his oppressive teaching style 'infected' the institution.