Mystery warriors made the fastest migration in ancient history

Around 1,500 years ago, horse-riding warriors known as the Avars appeared in southeastern Europe seemingly out of nowhere and established an empire lasting more than 200 years. Now, DNA evidence suggests that they crossed a continent in the span of a decade or two. Human remains from Avar tombs in what is now Hungary closely match those from an individual buried just a few decades earlier in what is now eastern Mongolia — almost 7,000 kilometres away.