How long is an elephant pregnant for? While a female elephant is in labor, the other elephants in the herd protect her by forming a circle around her. Most elephants only bear one baby at a time, but twins occur in approximately two percent of elephant births.
This set the stage for the complete elimination of silver from our coinage by the end of 1964. Any United States dime, quarter, half dollar or dollar that is dated 1964 or earlier is made of 90% silver. In the dime series, all coins dated 1965 or later are clad coins and contain no silver at all.
The last British general circulation coins to have any silver content at all were issued in 1946. After a steep rise in the price of silver around 1918/19, the silver content of British coins was reduced from 92.5% to 50% from the 1919 and 1920 issues.