Devil worm genes hold clues for how some animals survive extreme heat
The critters have extra copies of a gene that ramps up to deal with higher temperatures
![devil worm](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2019/11/112619_SB_hell-worm_feat.jpg?fit=1028%2C579&ssl=1)
Named after Mephistopheles, a devil in Faustian legend, devil worms (Halicephalobus mephisto) live in hellish conditions up to 1.3 kilometers underground.
John Bracht and Megan Guerin