[Red Badger]

Racetrack Playa, a desert lake bed in the mountains above California's Death Valley, where stones were known to move overnight leaving enigmatic trails Photo: Alamy

[vpintheak]

Pretty cool. I read about a year ago that researchers were speculating that ice and wind were doing it. Looks like it’s been proven. Pretty neat though.

[camle]

and all this time i thought it just HAD to be aliens!

[SMARTY]

NOW, maybe they can get to work on finding out what the h%^# happened to Nancy Pelosi’s brain!

[Moltke]

It was previously unknown what caused the rocks to move across Racetrack Playa

BS. Answer: An external force.

This has been known since Newton: When viewed in an inertial reference frame, an object either remains at rest or continues to move at a constant velocity, unless acted upon by an external force.

[bkepley]

Yeah but the stones they filmed aren't the real alien stones.

[Baynative]

[mmichaels1970]

The pioneers used to ride these babies for miles.

[BenLurkin]

Until the next theory comes along.

[TNoldman]

It took 50 years to discover this? Hmmm.....

[G Larry]

uh...how does the water pool under the rock and then freeze?

[LearsFool]

An oceanographer and an engineer? With a weather station, timelapse cameras, and GPS trackers?

And in the end, solving this 50-year-old mystery comes down to a couple of buddies camping for a few days and watching what happens?

(Did it take 50 years to get the grant to pay for all this? :-)

[Cyman]

For the same reason that dogs drag their arse across your carpet, their rock butt is inflamed

[laweeks]

Bush’s fault