On February 25, 1964, 22-year-old Cassius Clay shocks the odds-makers by dethroning world heavyweight boxing champ Sonny Liston in a seventh-round technical knockout.

Remember listening to it as a kid on a small transistor radio.

On February 25, 1828, John Adams, son of President John Quincy Adams, marries his first cousin and inadvertently follows a pattern of keeping marriages within the family.

John Adams’ grandfather, President John Adams, had married his third cousin, Abigail Smith. Intermarriage skipped a generation with John Quincy Adams, who married a non-relative. But, at 25 years old, John Quincy’s second-eldest son, John, married his first cousin on his mother’s side, 22-year-old Mary Catherine Hellen, in a private ceremony at the White House.