An enhanced look at the movement of populations during the time of the Roman Empire and the Vikings has illustrated ... which focuses on assessing genetic family trees. This allowed for a plethora ...

In one case, archeologists determined not only the age of a Viking ship found in Denmark, they also learned that it was built in Ireland. Tree rings can reveal more than just a tree's age.

The activity below allows you to build a tree-ring chronology. Each horizontal bar represents the tree-ring pattern for one tree. By looking for matches in the patterns, you should be able to ...