Vikings who settled in Iceland more than 1,000 years ago valued their horses so much that the men were buried with their trusty steeds. And DNA analysis of these treasured animals recently proved that the horses consigned to the grave with their manly owners were males, too.

For decades, archaeologists have studied the contents of hundreds of Viking graves in Iceland. Many of these graves also contained the remains of horses that appeared to have been healthy adults when they died.

Because the horses seemed well cared for in life — before they were killed and buried, that is — they were considered to be important to the men whose remains lay nearby. Recently, scientists conducted the first ancient DNA analysis of bones from 19 horses in Viking graves, and found that nearly all of the animals were male, a tantalizing clue about vanished Viking culture.

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