Answer: During the 20th century many advances were made, our world wouldn't be the same today without these scientists....
Scientists of the Modern World:
Albert Einstein: Theory of Relativity
Enrico Fermi: atomic weapons
Marie Curie: radiation
Henry Ford: mass-produced automobiles
Wright Brothers: aviation
Jonas Salk: polio vaccine
George Washington Carver: agricultural techniques
Charles Drew: blood banks
Sigmund Freud: developmental psychoanalysis
Thomas Edison: light bulb
Watson and Crick: DNA structure