I'm pretty annoyed that this article doesn't mention it, but the whole point of Prof. Clark's research is to find the human tolerance for rotation so that these

I'm pretty annoyed that this article doesn't mention it, but the whole point of Prof. Clark's research is to find the human tolerance for rotation so that these structures can be made as small as possible. I suppose the news here is that his candidates made it to 17 rpm, which appears to be a new record.