Technique allows estimation of the force acting on each grain of sand in a dune

Brazilian researchers have developed a technique that estimates the force exerted on each grain of sand in a dune from images ...
Live Science on MSN

Easter Island statues may have 'walked' thanks to 'pendulum dynamics' and with as few as 15 people, study finds

Simple physics may explain how the Easter Island statues could "walk" miles with only a handful of people, but the debate over their transport is far from over.