Europa's ice crust is crossed by thousands of double ridges, pairs of long parallel raised lines with a small valleys in between, sometimes as much as hundreds of miles long and skyscraper-height tall rims. While these double ridges are ubiquitous on Europa's surface, how they form remains something of a mystery to scientists. Dustin Schroeder, …
On The Frontier Of The Hunt For Signs Of Life On Early Earth And Ancient Mars
Seldom does one rock outcrop get so many visitors in a day, especially when that outcrop is located in rugged, frigid terrain abutting the Greenland Ice Sheet and can be reached only by helicopter. But this has been a specimen of great importance and notoriety since it appeared from beneath the snow pack some eight …
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A Unique Science Expedition to Greenland
It is my very good fortune to report that I have just arrived in Greenland for quite a scientific adventure. Over the next days, a group of scientists (along with me and NASA videographer Mike Toillion) will be traveling to the site of the stromatolite that might, or might not, be the oldest remains …
Many Worlds 