Fingernails have a life span of three to six months. That’s how long it takes them to grow from base to tip, progressing at the pace of 1.5 inches a year — or 0.000000047 inches a second.
In the wild, orcas are thought to live to seventy or eighty years of age. There is some evidence that females live longer than males, and the average life expectancy of male orcas is around forty to fifty years.
John Wilkes Booth’s brother once saved the life of Abraham Lincoln’s son.
Neutering a cat extends its life span by two or three years.
The Tower of Independence clock on the back of a U.S. $100 dollar bill shows the time as 4:10.
The Union ironclad, Monitor, was the first U.S. ship to have a flush toilet.