New mechanical metamaterials can block symmetry of motion

Engineers and scientists at The University of Texas at Austin and the AMOLF institute in the Netherlands have invented the first mechanical metamaterials that easily transfer motion effortlessly
 
by the University of Texas at Austin, source chemeurope.com
 
Original publication:

Corentin Coulais, Dimitrios Sounas & Andrea Alù; "Static non-reciprocity in mechanical metamaterials"; Nature; 2017