Jamie Fullerton, reporting for Motherboard:Daan Roosegaarde reached into the pocket of his suit jacket, pulled out a plastic bag filled with black powder, and waved it around. "This is Beijing smog," Roosegaarde said, before gesturing to the seven-metre tall, gently humming metal tower we are stood next to in the Chinese capital's art district, 798. "We collected it from the tower yesterday. Incredibly disgusting." Dutch designer Roosegaarde's smog souvenir may be disgusting, but it's the byproduct of an invention that he has touted as a potential alleviator of China's pollution problems. His "smog-free tower" sucks air, filters it with ion technology, with Roosegaarde having explained: "By charging the Smog Free Tower with a small positive current, an electrode will send positive ions into the air. These ions will attach themselves to fine dust particles. A negatively charged surface -- the counter electrode -- will then draw the positive ions in, together with the fine dust particles. The fine dust "is collected together with the ions and stored inside of the tower." With the dust collected, the tower then spews out cleaner air through vents, creating a "bubble" in the area surrounding it that contains, according to Roosegaarde, up to 70 percent fewer pollution particles than the pre-cleaned air.

Recently the founder of the Mars Settlement Research Organization and author of The International Mars Research Station Shaun Moss agreed to sit down and answer any questions you had about space exploration and colonizing Mars. Below you will find his answers to your questions.

Bennett Haselton writes: "While nothing can really 'prepare' you for your first time at Burning Man, there are a few simple steps that can eliminate a lot of the stress. Unfortunately it can be hard to get information out of the 10-year veterans about how to do things the easy way (some of them probably view the 'easy way' as 'ruining the whole point'). So here's some advice instead from someone who just got back from their first time, and who likes to take the path of least resistance." Keep reading for the rest of Bennett's Burning Man advice.

The name pretty much sums it up: There are cowboys. There are aliens. And Iron Man Director Jon Favreau has blown a pretty penny trying to make the whole thing work, getting the sexiest woman alive from Maxim a few years back, as well as a James Bond and a Han Solo to convince you to come to the theater and watch 6-shooters take on the little green men. Spoilers may exist below, but I promise to keep the review mostly lacking substance: just like the movie.

Mark Burroughs writes "Leave it to a SubGenius preacher to take normally mundane subjects, like software maintenance, and expose the unholy conspiracy behind them. I think the following quote from the introduction sums up the tone of the book nicely: 'Rather than shield your eyes from the sordid realities of the software industry, I am going to dust off my old 8mm films and let you take a good look at the uncensored truth for yourself. You may want to keep a paper bag handy in case you get sick.'" You know you want to read on for the rest of Burrough's review.

joesao writes "In this short, charming interview, Dr. Eva Harris talks about popularizing biology by doing what she calls "knowledge-based" technology transfer: "...people purify DNA for P.C.R. processing with a fancy substance made of silica particles, which costs about $100 for a few milliliters. [...] So what we've done is buy a 20-pound bag of ceramic dust for $5 at the hobby store. And you wash the stuff in nitric acid and sterilize it, and then you have thousands of tubes of that substance. We're not violating anything because the commercial manufacturers have their way of doing this, and we have ours." Open-source biology, anyone?"