Newslink: People can’t grow tails, so robot designers went ahead and made one

We’d probably be thrown a little off balance if we caught a glimpse of someone walking down the street with a fully-functioning tail — but it's comforting to know its owner would be balancing just fine... and looking like an Alien terror while doing it. Yes, thanks to a new, surprisingly usable rear appendage courtesy of the design world, we might someday get the chance to get bionic with our backsides.

https://www.syfy.com/syfywire/robot-designers-create-human-tail