Ancient Britons bedevilled by belly bugs

Analysis of skeletons bridging the Roman to the Victorian eras show ancients (unsurprisingly) carried parasitic stomach bugs, but patterns changed with the advent of sanitation.

This particular worm is a dog-heart worm, but similar parasitic worms are found in the intestines of humans, spreading via faecal matter or undercooked food. Credit: Ed Reschke/Getty Images