Sand has a memory of sorts. Press into a loose pile of dry grains and something moves, not just where your finger sits, but ...

本集内容. Rubik's Cube fans go head-to-head at 'speedcubing' event 魔方爱好者在 “魔方速拧赛” 中一决高下. 文字稿. Tymon, World record-holding cuber "I ca ...