Guglielmo Marconi, inventor of wireless telegraphy and winner of the 1909 Nobel Prize in Physics @facethenation

Guglielmo Marconi sent first wireless transmission (Morse code signal for the letter "s") across the Atlantic Ocean on December 12, 1901

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Charles Conrad taking a sample of the lunar surface. Apollo 12, the second mission to the Moon, landed on November 19, 1969 @facethenation

Charles Conrad on the Moon

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Wang Weilin, a 19-year-old student, stood in front of a column of tanks in 1989 and in doing so became one of the most powerful protesters of the 20th century @facethenation

The "Tank Man" stopping the column of tanks on June 5, 1989, the morning after the Chinese military had suppressed the Tiananmen Square protests of 1989 by force

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During a spacewalk on the 1966 Gemini 12 mission, Buzz Aldrin took a moment to turn his camera around and take the first selfie, in space @facethenation

Buzz Aldrin and the first space 📸 selfie

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Aviation pioneers Orville and Wilbur Wright made history December 17, 1903, with the first successful controlled flight @facethenation

Wright Brothers ✈️ first flight

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During his two hour, eight minute spacewalk on June 5, 1966, Gemini 9 pilot Eugene Cernan is seen outside the spacecraft @facethenation

Cernan's space­walk was troubled from the start. His visor fogged, he sweated profusely and struggled with his tasks, and he had problems moving in microgravity

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Albert Michelson, winner of the 1907 Nobel Prize in Physics for his work on finding the 💫 speed of light. He received 1st Nobel Prize awarded to an American scientist @facethenation

Albert Michelson made use of a special eight-sided revolving mirror and obtained a value of 299,798 km/sec for the velocity of light

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Apollo 7 was the first manned flight of the Apollo Program, and was the first mission to use TV cameras from space, October 14, 1968 @facethenation

Walter Schirra and Donn Eisele are seen in the first live television transmission from space. Schirra is holding a sign which reads, "Keep those cards and letters coming in, folks!"

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During World War II, Franklin Roosevelt and Winston Churchill met in 1941 aboard the battleship Prince of Wales to sign the Atlantic Charter that set out a vision for the postwar world @facethenation

Winston Churchill walking the deck of the battleship Prince of Wales during the Atlantic Charter Conference, August 11, 1941

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Russell Schweickart takes pics during an extravehicular activity spacewalk, March 1969 @facethenation

Russell Schweickart performs a spacewalk to test the new spacesuit and backpack designed for moonwalking astronauts

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