A stash of "unusually large" 2,000-year-old shoes dug up at a Roman site in northern England has left archaeologists searching for an explanation.

Dr Sam Willis discovers how the British artist Norman Wilkinson developed dazzle camouflage to protect ships from German U-boats during the First World War.

Choose from 30,804 Monster Silhouette stock illustrations from iStock. Find high-quality royalty-free vector images that you won't find anywhere else.