On this Day in History

On this Day in History in 1904: US Congress authorizes Lewis & Clark Expo $1 gold coin.
 
On this Day in History in 837: Best view of Halley’s Comet in 2000 years.
 
On this Day in History in 1970: Apollo 13 announces “Houston, we’ve got a problem!” as Beech-built oxygen tank explodes en route to Moon.
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Fun Fact of the Day

Fun Fact of the Day: When the Earth’s shadow sweeps across the lunar landscape, the temperature drops radically. In fact, the resulting “thermal shock” may cause lunar rocks to crumble and gas to escape from within the moon.

Fun Fact of the Day

Fun Fact of the Day: Time on Earth is actually slowing down. Due to tidal friction from the sun and moon, the solar day is lengthening by 1.7 milliseconds each century as the Earth’s rotation slows down.