i thought cork did this? it have vague memories of learning about negative poisson ratios... hmmm. not quite the same thing - something with a negative pr wi

i thought cork did this? it have vague memories of learning about negative poisson ratios... hmmm. not quite the same thing - something with a negative pr will contract sideways when pushed from the top (which would help a cork go into a bottle neck, but i haven't found any confirmation of that yet). meh. "close to zero" is the best i can find for cork. which at least means it doesn't get harder to push it in as you push.