Researchers bulldoze desert to learn how sand dunes form
Marks on Martian dunes may be tracks of dry-ice sleds
(Phys.org) —NASA research indicates hunks of frozen carbon dioxide—dry ice—may glide down some Martian sand dunes on cushions of gas similar to miniature hovercraft, plowing furrows as they go.
Scientists measure Martian sand movement: Dune migration rates appear to be similar to those on Earth
Last year, images from NASA's Mars Reconnaissance Orbiter captured sand dunes and ripples moving across the surface of Marsobservations that challenged previously held beliefs that there was not a lot ...
Winds of change strike Mars, too
Mysterious dark sand dunes around Mars' northern polar cap are shifting with the seasons, as carbon dioxide gas changes form and sparks landscape-altering avalanches, said a study published Thursday.
Ice sheet melt identified as trigger of Big Freeze
The main cause of a rapid global cooling period, known as the Big Freeze or Younger Dryas - which occurred nearly 13,000 years ago - has been identified thanks to the help of an academic at the University of Sheffield.
Mice living in sandy hills quickly evolved lighter coloration
In a vivid illustration of natural selection at work, scientists at Harvard University have found that deer mice living in Nebraska's Sand Hills quickly evolved lighter coloration after glaciers deposited ...
Cassini Maps Global Pattern of Titan's Dunes
(PhysOrg.com) -- Titan's vast dune fields, which may act like weather vanes to determine general wind direction on Saturn's biggest moon, have been mapped by scientists who compiled four years of radar data ...
Martian rock arrangement not alien handiwork
At first, figuring out how pebble-sized rocks organize themselves in evenly-spaced patterns in sand seemed simple and even intuitive. But once Andrew Leier, an assistant geoscience professor at the U of C, started observing, ...
Plastic, 'wrong-way' dunes arise on Saturn moon Titan
(Phys.org) —The dunes of Titan tell cosmic tales. A Cornell senior and researchers have narrowed theories on why the hydrocarbon dunes – think plastic – on Saturn's largest moon are oriented in an unexpected ...
The physics of ocean undertow: Small forces make a big difference in beach erosion
People standing on a beach often feel the water tugging the sand away from under their feet. This is the undertow, the current that pulls water back into the ocean after a wave breaks on the beach.
Curiosity rover drives on after crossing Martian dune
(Phys.org) —NASA's Curiosity Mars rover is continuing its traverse toward enticing science destinations after climbing over a dune spanning a gap in a ridge.
Martian chemical complicates hunt for life's clues
The quest for evidence of life on Mars could be more difficult than scientists previously thought. A scientific paper published today details the investigation of a chemical in the Martian soil that interferes ...
Study suggests debris flows on frozen arctic sand dunes are similar to dark dune spot-seepage flows on Mars
A team of scientists from Southwest Research Institute (SwRI) has demonstrated that frozen water in the form of snow or frost can melt to form debris flows on sunward-facing slopes of sand dunes in the Alaskan arctic at air ...