The best answer to any question.

Aug. 19 2016 7:13 AM

Should Children Learn MMA?

Answer by David Chan, M.D., black belt Shotokan karate, learning Krav and MMA:

As with every question and answer on martial arts, it always depends on the school and instructor. Add in kids and the selection becomes even more important because the school and instructor(s) are likely to have meaningful imprints on their developing personalities. Training for kids is not the same as for training teens, where the training because more like that of adults.

Aug. 18 2016 7:05 AM

How Does a Person Know When Someone Is Looking at Her?


Answer by Paul King, director of data science at Quora, computational neuroscientist:



There are several things going on when you see someone looking at you, all of which happen very quickly. (This applies to actually seeing someone looking at you, not “sensing it” from behind or in the periphery.)


Aug. 17 2016 7:08 AM

What’s the Best Way to Earn Respect at Work?

Answer by John L. Miller, software engineer and architect who has worked at Microsoft, Amazon, Google, and Oracle:

The path to becoming respected is simple. How do you get more respect? You earn it.

At work, here are things you can do to earn more respect:

Aug. 16 2016 7:04 AM

What Went Wrong at Yahoo?

Answer by Igor Markov, EECS Professor at Michigan:

Yahoo started as a manually constructed list of links to websites and aspired to be a media portal to the web. The culture that developed at Yahoo apparently shortchanged engineering in the grand scheme of things; media people were viewed more important. At Google, engineers were first-class citizens, so Google attracted top engineers and could be very selective in hiring. Over the years, Google (and later Facebook) assembled a greater brain and skill capital than Yahoo. Google started later than Yahoo and viewed the core challenge as an algorithmic problem—finding the best websites through automated indexing and real-time search, not manual indexing like Yahoo. So, Google relied on automation more; used a memorable, minimalistic interface that didn’t require daily maintenance; focused on a better-defined objective; and leap-frogged the competition.

Aug. 15 2016 7:09 AM

Is Denial Healthy?

Answer by David Chan, M.D. from UCLA, Stanford oncology fellowship:

A certain amount of denial is healthy in life. We can’t go day by day fearful of possible disaster.

I take care of cancer patients and do my very best to present to them the seriousness of their situations in an open and frank manner (except for the rare patient who responds to my question about wanting to know in the negative).

Aug. 13 2016 7:04 AM

What Are the Differences Between Teaching Undergraduate and Graduate Students?

Answer by Elizabeth H. Simmons, dean, professor, ACE fellow, physicist:

As a physics professor, I’ve taught students at every level in the university from freshman nonmajors through doctoral students.

The pedagogical tools are similar at all levels, in that active-learning methods are the most effective for promoting deep understanding and mastery. One should use pure lecture as sparingly as one can and do as much as possible to get the students talking and applying material right in the classroom. However, it is far easier to come up with classroom tabletop demonstrations for elementary courses than for advanced ones (those tend to get rather heavily mathematical), so the particular kinds of active learning one employs shift from the hand-on to the calculational and conceptual as one moves from freshmen through graduate students.

Aug. 12 2016 7:09 AM

How Does NASA Use Underwater Missions to Prepare for Space?

Answer by Robert Frost, instructor and flight controller in the flight operations directorate at NASA, on Quora:

The NASA Extreme Environment Mission Operations, or NEEMO, project has a charter to extend human presence across the solar system by the affordable and innovative use of spaceflight analogs.

Aug. 11 2016 7:04 AM

Does Clark Kent Become Superman, or Does Superman Become Clark Kent?

Answer by Elliot S. Maggin, principal writer of the comic book series, 1971–86:

Most of the latter-day Superman writers, and several of my own contemporaries, come down on the side of the notion that Clark is the real person and Superman is just what he can do. I don't agree with that at all, and here's why:

Aug. 10 2016 7:02 AM

What Is Jeff Bezos’ Biggest Mistake at Amazon?

Answer by Auren Hoffman, CEO of SafeGraph:

One big mistake that Amazon is making right now is that it is not giving anyone access to its data, customer relationships, and so on.

Amazon’s strategy has been to own 100 percent of the transaction—and that has worked out really well for them thus far. But it has an opportunity to power every e-commerce transaction by providing access to easy login, payments, authentication, and data on every buyer. It could make everyone’s e-commerce experience much, much better. Not only would that give Amazon more access to the pie, it will significantly grow the pie because it would provide a lubricant to make all e-commerce transactions (especially in mobile) better.

Aug. 9 2016 7:07 AM

How Has Elizabeth Holmes’ Gender Influenced the Coverage of Theranos?

Answer by Tirumalai Kamala, immunologist, Ph.D. mycobacteriology:

Theranos started in 2003, yet breathless news coverage about it and Elizabeth Holmes began 10 years later, around August or September 2013. This begs the question: What was happening at Theranos between 2003 and 2013? What had Holmes and Theranos done in those 10 years? We may never fully know, but we have ample media coverage to help outline what we've learned about Theranos since 2013. When the news media first introduced us to Holmes, Theranos had assembled a board of political heavyweights with heft among deep-pocketed people around the world and attracted steadily increasing investment. It also announced a partnership to open Theranos Wellness Centers inside Walgreens drug stores—the first one in Palo Alto, California, in September 2013, and it expanded to several more in the Phoenix area a month later.