I still fear sandstorms, which can come up with little ... land on the sunny side of a sand dune; the shady side usually has downdrafts, so you just drop like a stone. White sand is safer to ...

They may resemble kidney beans, but formations on the northern hemisphere of Mars are actually sand dunes covered ... By imaging the dunes, scientists can figure out how much CO2 frost forms ...

Behind many of these beaches are sand dune systems which provide homes for diverse forms of wildlife including plants and insects, some so highly specialised that without these dune habitats ...