Mars' dramatic north-south divide has puzzled scientists for half a century. However, they may now have a conclusive answer.

In one case, archeologists determined not only the age of a Viking ship found in Denmark ... The basis of dendrochronology lies in a tree's unique pattern of growth rings. The rings form a ...

The brooches are highly decorated with patterns common to the era Two intricately decorated Viking age bronze brooches found by metal detectorists on the Isle of Man have gone on display for the ...