Head lice hitched a ride on humans to the Americas at least twice
The parasites’ genetics can give in-depth insights into hosts’ pasts
![a single head louse](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2023/11/110723_jb_lice-human-migrations_feat.jpg?fit=1030%2C580&ssl=1)
The DNA of head lice (one shown) tells the story of human migration across the globe, a new study shows.
Vincent Smith/Natural History Museum, London (CC-BY 4.0)