Title Text:To detect dark matter, we just need to build a bird feeder that spins two squirrels around the rim in opposite directions at relativistic speeds and collides them together. Origin:https://xkcd.com/2186/ https://www.explainxkcd.com/wiki/index.php/2186:_Dark_Matter 为了探测暗物质，我们只需要建造一个喂鸟器，让两只松鼠以相对论速度沿相反方向旋转，然后将它们碰撞在一起。 http://xkcd.in/comic?lg=cn&id=2186 梅根（Megan）和母球（Cueb… Read more