Dolphins appear to perceive magnetic fields
![bottlenose dolphin](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/09/dolphin_860free.jpg?fit=860%2C460&ssl=1)
This bottlenose dolphin and five others were more quickly interested in a block that was magnetized than one that was not, suggesting the animals can sense magnetic fields.
Courtesy of Planète Sauvage, France