4. The last time there was a total solar eclipse visible only in the United States was in 1776.
The August 21st eclipse is especially rare because it is the first continent-wide eclipse to be viewable only in the United States since the same year the country came into existence. Additionally, it’s the first time since 1918 that an eclipse’s path of totality stretched unbroken from one coast to the other.
H/t reader squodgy.
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