Yup a throwback TED Talk. This one’s about how Margaret Wertheim and her sister crocheted the coral reef. In doing so, she was able to investigate hyperbolic geometry and the theories surrounding it.
Critical thinking is thinking that questions assumptions. It is a way of deciding whether a claim is always true, sometimes true, partly true, or false. -via Wikipedia
It was through playing, or hands-on experimentation, that she was able to defy previous beliefs on this topic. It’s a favorite on Ted.com if you’re interested.