Lava and frost may form the mysterious lumps on Jupiter’s moon Io
Jets of gas released when hot meets cold could explain what looks like dunes
![a blue burst of light from a volcanic eruption can be seen on the surface of Io](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2022/05/042922_no_io_feat.jpg?fit=1030%2C580&ssl=1)
A volcanic eruption (blue) can be seen on Jupiter’s moon Io, the most volcanically active body in the solar system. This image was taken by NASA’s Galileo mission, which ended in 2003.
JPL-Caltech/NASA, DLR