Mark Twain was born in 1835 on the day Halley's Comet made it's once every 75 year appearance.....he died in 1910 on the day the comet reappeared.
In 1883, Edgar Allen Poe wrote a book , The Arthur Gordon Pym of Naugatuck.....in the book, four men adrift in a boat, kill and eat the cabin boy, Richard Parker.......40 years later, four men adrift in a boat kill and eat the cabin boy, named Richard Parker, to survive...
--The sun is precisely 395 times larger than the moon, and is precisely 395 times farther away from the earth than the moon.
The two appear Precisely the same size when seen from earth because of the precise ratio of the distances
20 Year Intervals of US Presidential Deaths
1840: William Henry Harrison (died in office)
1860: Abraham Lincoln (assassinated)
1880: James A. Garfield (assassinated)
1900: William McKinley (assassinated)
1920: Warren G. Harding (died in office)
1940: Franklin D. Roosevelt (dies in office)
1960: John F. Kennedy (assassinated)
1980: Ronald Reagan (survived assassination attempt)