Granular model explains unusual behavior in sand
From a mechanical perspective, granular materials are stuck between a rock and a fluid place, with behavior resembling neither a solid nor a liquid. Think of sand through an hourglass: As grains funnel through, ...
Snakes and snake-like robots show how sidewinders conquer sandy slopes
The amazing ability of sidewinder snakes to quickly climb sandy slopes was once something biologists only vaguely understood and roboticists only dreamed of replicating. By studying the snakes in a unique ...
Sampling study suggests Mississippi River has ample sand to prevent delta land loss
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 ...
Self-sculpting sand could allow spontaneous formation of new tools, duplication of broken mechanical parts
Imagine that you have a big box of sand in which you bury a tiny model of a footstool. A few seconds later, you reach into the box and pull out a full-size footstool: The sand has assembled itself into a large-scale ...
Sand Flea robot is set to leap into reconnaissance (w/ video)
Earth's oldest fossils boost hopes for life on Mars
(PhysOrg.com) -- Microfossils found in Australia show that more than 3.4 billion years ago, bacteria thrived on an Earth that had no oxygen, a finding that boosts hopes life has existed on Mars, a study published ...
Spitzer sees crystal 'rain' in outer clouds of infant star
(PhysOrg.com) -- Tiny crystals of a green mineral called olivine are falling down like rain on a burgeoning star, according to observations from NASA's Spitzer Space Telescope.
Why the sandfish lizard wriggles as it does (w/ Video)
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 ...