Barnacles track whale migration
Chemical composition of hitchhikers’ shells might reveal ancient baleen travel routes
![Baleen whale](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/09/092616_TS_whale-migration_main.jpg?fit=860%2C460&ssl=1)
BARNACLE BIOGRAPHY The barnacles that latch on to baleen whales, such as this humpback, may offer a record of their hosts’ movements, even millions of years later, new research suggests.
Gregory "Slobirdr" Smith/Flickr (CC BY-SA 2.0)