We can probably add another interesting discovery to this list. An article in Live Science gives the gist:
“A network of ancient rivers lies frozen in time beneath one of Greenland's largest glaciers, new research reveals.”
The article then mixes data and assumptions, featuring belief in millions of years:
“The subglacial river network, which threads through much of Greenland's landmass and looks, from above, like the tiny nerve fibers radiating from a brain cell, may have influenced the fast-moving Jakobshavn Isbrae glacier over the past few million years.”
We shouldn’t forget that that no one has actually dated the rivers and radiometric dating has serious defects.
We can’t be absolutely sure whether the hidden rivers are relics of Noah’s Flood but that seems to be a valid interpretation. What we know is that they are a glimpse into a world that differs a lot from ours.
Ghose, Tia. 2016. Secret World of Primeval Rivers Lies Beneath Greenland Glacier. Live Science (5 July).