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, they appear ...

Researchers bulldoze desert to learn how sand dunes form

(Phys.org) —A team made up of members from research facilities in France and China has found that theoretical models built to describe sand dune formation align very closely with how they actually form in nature. In their ...

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.

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 Sunday says.

page 2 from 37