They can also walk upside down - upwards and downwards on a tree trunk - with equal speed thanks to their 180 degree rotating ankle sockets., 松鼠有180度的旋转踝窝，这让它们能在树干上倒着上上下下，而且速度不相上下。

Whether you're tired of your monoculture lawn or just want to cover up a dead grass patch with something interesting, this plant is perfect for the job.