Fatto generale: 208 is the heaviest stable isotope of any element (lead).
Fatto matematico: 208 is the sum of the squares of the first five primes.
Trivia: 208 is the area code for the US state of Idaho.
Data storica: July 26th is the day in 1775 that the office that would later become the United States Post Office Department is established by the Second Continental Congress.