curprev00:1400:14, 28 June 2018 Hypanistalkcontribs m3,634 bytes+35 1) There was a typo in the page title itself and all uses of the word. It's Hypanis Valles, not Vallis. The names of features on planetary surfaces are governed by the IAU and Hypanis Vallis does not exist. This is simply a typo that has propagated through some literature due to carelessness. 2) The previous wording "a significant river delta exists at its outlet" is contentious. I changed the wording to acknowledge that a delta is one of several interpretations in the literature.undoTag: Visual edit: Switched