Watching this newborn island erode could tell us a lot about Mars
Its volcanic tuff is tougher than expected and may withstand ocean waves for years
![Hunga Tonga-Hunga Ha’apai](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/12/121117_CG_tongan-island_feat.jpg?fit=860%2C460&ssl=1)
BABY PICS Scientists are keeping an eye on the rates of erosion of volcanic ash on Earth’s newest island, called Hunga Tonga-Hunga Ha’apai.
Cecile Sabau, Damien Grouille, NASA