The front of the coin represents Christ’s crucifixion (right). The reverse side has the Greek letters alpha and omega, symbolizing God as the beginning and the end (left). National Museum of Denmark / Søren Greve / John Engedahl Nissen Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. A pair of rare silver coins discovered by metal detectorists in Denmark were meant to offer 11th century Christians a bit of protection against Viking raiders .. According to the National Museum of Denmark, only 30 of these silver coins laden with Christian imagery have ever been found.  The coins were uncovered in northern and southern parts of Denmark’s Jutland peninsula. England minted the  coin in 1099 during the reign of King Æthelred II, also known as “Æthelred the Unready” after the Anglo-Saxon king did not adequately prepare his country for Viking attacks. The nickname “unready” is also a bit of wordplay from the 12th century.…