QIANTU

So much space inside us

全人类可以被装进一个糖盒子里。

Every human being is made up of many atoms (原子). All these atoms have a lot of empty (空的) space inside them. In fact, over 99.9 percent of each atom is empty. So if we take out all the empty space, the human body would be very small. The entire human race could fit in a sugar cube (盒子)!