时间的形状: 相对论史话（升级版）

This is an interesting popular science book. You may have these questions for a long time. Is the eternal flowing time untouchable, invisible or does it have shape and colors? Is the space we are in three dimensions, four dimensions or five dimensions? Can we take the time machine and travel to the past and future as we want? You can find all the answers in the book. With this book, you will easily know the theories you thought you could never grasp and you will enter a fabulous world that you thought you could never understand.