This is one of the neatest technologies ever. U of R researchers can etch a surface with a laser to create a material that repels water. Watch the video and see water bouncing off of the surface.
The Monty Hall Problem illustrates how probability is often unintuitive. This article tells an interesting story about how Marilyn vos Savant (of “Ask Marilyn”) schooled many educated and math-savvy people. Her answer is correct but because it is not intuitive many people think the answer is wrong. It is humous to see people using their PhD as an appeal to authority to dismiss her solution. Math should be argued with logic.