Winter road salting reshapes next summer’s butterflies
Anti-ice treatments can have sex-specific effects
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/06/sm_9705275516_2902ac2e6a_o_free.jpg?fit=860%2C460&ssl=1)
SALTED Monarch butterflies that weren’t even alive during the winter can show the physiological effects of road salting if caterpillars fed on milkweeds that picked up extra sodium.
Seney Natural History Association/Flickr (CC BY-SA 2.0)