Inventors:
1904. Benjamin Holt invents a tractor.
1907. Leo Baekeland invents the first synthetic plastic called Bakelite.
Explorers:
Thomas Gann - explored the ruins of the Maya civilization.
George Mallory - took part in the first three British expeditions to Mount Everest, in the early 1920s.
Astronauts:
Yuri Alekseyevich Gagarin - was the first human to journey into outer space.
Neil Armstrong - was the first person to walk on the Moon.