That's the title of the NASA press release (I added the date). 8 a.m. PDT = 3 p.m. UCT = 5 p.m. CEST (Central European Summer Time) The panel includes an expert for the HiRISE experiment, a high-resolution telescope in Mars orbit. Whatever they have, apparently images of some area are highly relevant. One of the panel members is Lujendra Ojha, a PhD candidate. If they include him, it is very likely the discovery is directly connected to his work. According to his website: Those structures are visible to HiRISE. Variations from year to year are not new. Did they see something in action? Mary Beth Wilhelm is an organic biogeochemist (research interests). How to combine organic biogeochemistry with Recurring Slope Lineae? Update: Very strong indications of liquid water on Mars - today. Spectroscopy of the RSL shows chemical compounds called perchlorates, and it is expected that they cannot form without liquid water. This liquid water is probably very salty, which lowers its freezing point. It is unclear if life can survive the high expected salt contents.