https://news.google.com/rss/articles/CBMiRGh0dHBzOi8vcGh5cy5vcmcvbmV3cy8yMDIzLTExLWNvbGxhcHNlZC1tYXJzLWxhdmEtY2hhbWJlci1zcGFjZS5odG1s0gFDaHR0cHM6Ly9waHlzLm9yZy9uZXdzLzIwMjMtMTEtY29sbGFwc2VkLW1hcnMtbGF2YS1jaGFtYmVyLXNwYWNlLmFtcA?oc=5
A collapsed Mars lava chamber seen from space - Phys.org