When NASA’s Apollo 11 mission sent the first astronauts to the moon 50 years ago, there were many things we didn’t know. Like whether the moon’s surface would turn out to be a field of quicksand, if space germs would infect the astronauts, or what exactly the moon was made of. To commemorate the 50th anniversary of the Apollo 11 moon landing, we join forces with the National Air and Space Museum’s podcast, AirSpace, to explore the mysteries of lunar science: what we didn't know then, and what we still don't know today.Listen to AirSpace, stories that defy gravity: airandspace.si.edu/learn/airspace-podcast

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