HART, Mich. (WOOD) — No charges will be filed against the driver of a modified Jeep that hit and killed a spectator at the Silver Lake Sand Dunes last month, with the prosecutor citing the ...

Jeep stated this setup was chosen specifically to allow for higher speeds in 4LO—the kind you need when hauling it up the face of a sand dune. An Off-Road Plus button inside adjusts throttle ...

This story appears in the November 2012 issue of National Geographic magazine. I got my first lesson in the physics of sand dunes in 1998 on an expedition into the Sahara. In order to take aerial ...