One of the insights of remote sensing has been that, if you look for changes, you will tend to find them. And generally you are surprised by the things you dis

One of the insights of remote sensing has been that, if you look for changes, you will tend to find them. And generally you are surprised by the things you discover. The linked article is one, and various Martian phenomena are another - @varelse linked the landslides, but there are also dust devils, winds, and ice caps. The geysers on Enceladus are another example. Nighttime astronomy has also had these surprises -- supernovae (leading to the discovery of dark energy), gamma ray bursts, blazars. All because we had the computational and data-gathering machinery to compare observations from surveys. In retrospect, it perhaps wasn't surprising, but I think discipline scientists have indeed been surprised by the variety of phenomena observed.