Roman skulls unearthed by "lost" London river

The Walborn River used to run through London until it was paved over in the 15th century. Recently the river made it's presence known when 20 skulls, dating to the 3rd or 4th century, were discovered washed from a Roman burial site.

The remains, along with around 10,000 other artifacts, were found by archaeologists working on the city's Crossrail project. Experts believe that the skulls were washed from graves outside the original Roman walls.