The gestation period for an elephant is 640 to 660 days. This is equivalent to about 95 weeks, or 22 months, and is the longest gestation period of any mammal.
Dimes dated after 1964 are copper-nickel clad and contain no silver. Quarters are also clad, except for the bicentennial commemorative coins with an S mint mark that were produced for mint and proof sets. Kennedy half dollars from 1965 to 1970 were 40 percent silver composition. After 1970, all Kennedy halves were clad, except the same S bicentennial issue.
These Silver coins, sometimes referred to as junk Silver coins or scrap Silver, are a great way to buy Silver and start your Silver investments. Produced by the United States from mid-1942 to 1945, war nickels were made from 56% copper, 35% Silver and 9% manganese. The government was able to use the saved nickel, previously used in coinage, for the production of military supplies during World War II.