Falling seems to be a huge issue for the elderly, has anyone found a viable solution? Answer by Samantha Hunter, Clinical Senior: "There are a few things that we can encourage everyone to do to help reduce their falls risk..."

What was the reason behind Shakespeare's inclusion of witches, prophecies, and magic in "Macbeth"? Answer by Brian Overland: "Shakespeare, a man of practicality..., took away a practical lesson: Whatever you do, for God's sake, STAY ON THE GOOD SIDE OF THE MONARCH!"

What is pelican crossing in the UK? Answer by Yīng Míng | 赵英明, London "Black Cab" driver: "Pelican Crossings were introduced to solve the "flashing amber" problem, and replaced the Belisha Beacons with a pair of traffic lights controlled by a button box on the support pole."

When are polynomials ever used in the real world? Answer by Senia Sheydvasser, PhD in Mathematics: "Let's talk about knots, polynomials, quantum mechanics, and money."

Can someone help me intuitively understand how a wave function works and the role of probability in quantum mechanics? Answer by Mark John Fernee: "I think that one of the primary questions to answer is, why is the wavefunction necessary? The short answer is: Interference."