Searches for dark matter particles have come up empty so far, driving theorists to get more creative with their ideas.
Dark Space Official on MSN
Why NASA astronauts detonated explosives on the moon to reveal its hidden interior
During the Apollo missions, NASA astronauts carried out an extraordinary seismic experiment that involved launching explosive charges across the lunar surface. These controlled detonations revealed ...
On Christmas Eve 1968, the Earth received a message from astronauts on a mission like no other - the first around the moon. NASA will return in 2026.
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