441Which brothers are credited as pioneers of motion pictures (cinema)?
442Who is credited with inventing the phonograph, an early sound recording device?
443Who invented the safety elevator, enabling the construction of tall buildings?
444Who is credited with building one of the first practical modern automobiles?
445Who developed the first practical single-rotor helicopter?
446Who is credited with inventing the turbojet engine?
447Who built the first working laser in 1960?
448Which early computer network, launched in 1969, is considered a precursor to the modern Internet?
449Which artificial satellite, launched in 1957, was the first to orbit the Earth?
450Who was the first human to travel into outer space?
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