To Appreciate the Limits of Knowledge

Eight questions where the correct answer is "I don't know." (Via.)

But don't stop there. Understand the current limits of knowledge so you can learn to hack them, and ultimately transcend them.

I suspect we have the tools to answer the ice question. Photograph it under an electon microscope, and compare it to the best image you can get without a vacuum. That, plus a solid background in solid state physics, should be sufficient.