A new canyon grander than the Grand


A 3-D view of the subglacial canyon, looking northwest from central Greenland. Source J. Bamber, University Bristol

Trick question: what planet has a canyon grander than the Grand? Answer: if the science denier wing has their way, it may be coming soon to a continent near you:

The age of discovery isn’t over yet. A colossal canyon, the longest on Earth, has just been found under Greenland’s ice sheet, scientists announced Thursday in the journal Science.

“You think that everything that could be known about the land surface is known, but it’s not,” said Jonathan Bamber, lead study author and a geographer at the University of Bristol in the United Kingdom. “There’s still so much to learn about the planet.”