Researchers in Nebraska tested a new tool on Friday that could eventually help in fighting grass fires -- drones. A team from the University of Nebraska-Lincoln flew an unmanned aircraft over the prairie at the Homestead National Monument of America on Friday, dropping ping pong-like balls filled with a chemical mixture to ignite brush-clearing grass fires. Local and federal officials are interested in the technology because it could help clear overgrown vegetation in rugged, hard-to-reach terrain, said Michael Johnson, a spokesman for the National Park Service. The balls are filled with a chemical powder, potassium permanganate, before they're loaded into the drone. During flight, the aircraft pierces the ball with a needle and injects it with another chemical, glycol, before releasing it.

Editor's note: Digital Trends has partnered with WebVisions, the internationally recognized design, technology and user-experience conference, to help bring luminary Douglas Rushkoff to this year's event in Portland, Oregon. As part of our partnership, we're also pleased to feature select content from WebVisions' insightful blog, Word. This week, contributor Mark Wyner wonders how we go about teaching artificial intelligence right from wrong. Twitter has admitted that as many as 23 million (8.5 percent) of its user accounts are autonomous Twitterbots. Many are there to increase productivity, conduct research, or even have some fun.

A century ago, more than 60,000 tigers roamed the wild. Today, the worldwide estimate has dwindled to around 3,200. Poaching is one of the main drivers of this precipitous drop. Whether killed for skins, medicine or trophy hunting, humans have pushed tigers to near-extinction. The same applies to other large animal species like elephants and rhinoceros that play unique and crucial roles in the ecosystems where they live.

At first I was worried that this was going to be just another drone footage video with pompous music, but all of a sudden...that GIANT ROBOT EYEBALL BLIMP we saw in Germany last month shows up.

Wearing black headsets with tentacle-like sensors stretched over their foreheads, the competitors stare at cubes floating on computer screens as their small white drones prepare for takeoff. Some struggle to move even a few feet, while others zip confidently across the finish line. The competition -- billed as the world's first drone race involving a brain-controlled interface -- involved 16 pilots using willpower to drive drones through a 10-yard dash over an indoor basketball court at the University of Florida this past weekend. The Associated Press was there to record the event, which organizers hope to make an annual inter-collegiate spectacle, involving ever-more dynamic moves and challenges and a trophy that puts the brain on a pedestal. "With events like this, we're popularizing the use of BCI instead of it being stuck in the research lab," said Chris Crawford, a PhD student in human-centered computing.

Wearing black headsets with tentacle-like sensors stretched over their foreheads, the competitors stare at cubes floating on computer screens as their small white drones prepare for takeoff. Some struggle to move even a few feet, while others zip confidently across the finish line. Competitors in the Florida race use specially programmed headbands to monitor their brainwaves - moving the drone when they will it to happen. The EEG headset is calibrated to identify the electrical activity associated with particular thoughts in each wearer's brain -- recording, for example, where neurons fire when the wearer imagines pushing a chair across the floor. Programmers write code to translate these'imaginary motion' signals into commands that computers send to the drones.

Scott Aaronson has one of the highest intelligence/pretension ratios I've ever encountered. I wasn't really aware of him before last fall, when I attended a conference at New York University on an ambitious new theory of consciousness, integrated information theory. Most speakers touted IIT or tried to tease out its implications. The striking exception was Aaronson, a boyish (he turns 35 on May 21 but looks younger) computer scientist at MIT (soon leaving for the University of Texas--too bad, MIT!). Although at first he seemed nervous, even jittery, he proceeded to demolish IIT. He focused on a key IIT variable, phi, which denotes the inter-connectivity, or synergy, of the parts of a system. The more phi a system has, the more consciousness it has, supposedly. Aaronson argued--or showed, actually--that IIT's mathematical definition of phi implies that a simple information-storage device, like a compact disc, can be more conscious than a human being. Browsing Aaronson's blog, "Shtetl-Optimized," I discovered that he writes not only about quantum computation, his specialty, but also about artificial intelligence, mathematics, cosmology, particle physics, philosophy… Aaronson has things to say about almost everything. Even when he is at his most technical, he expresses himself in a down-to-earth, funny, self-deprecating and above all clear way. He exudes the spunky enthusiasm and curiosity of a 10-year-old kid, a kid who happens to have a firm grasp of mathematics and physics. He thinks I'm wrong about the end of science, and that's fine with me. Hell, he might be right! I won't say more about him here, because I don't want to embarrass him--or myself--more than I already have, and because he reveals so much of himself in what follows. Warning: this is an extra-long Q&A, but if you read it, I predict, you too will become an Aaronson fan. Come on, that's too high a bar! When I was a kid, I wanted to be the founder and ruler of a rationalist space colony, who also wrote video games and invented the first human-level AI and led a children's liberation movement and discovered the mathematical laws underlying society. On the other hand, as far as childhood dreams go, I have no right to complain. I have a wonderful wife and three-year-old daughter. I get paid to work on engrossing math problems and mentor students and write about topics that interest me, to do all the things I'd want to do even if I weren't getting paid. It's one of those things, like a joke, that dies a little when you have to explain it--but when I started my blog in 2005, it was about my limitations as a human being, and my struggle to carve out a niche in the world despite those limitations. It also gestured toward the irony of someone whose sensibility and humor and points of reference are as ancient as mine are--I mean, I already felt like a senile, crotchety old man when I was 16--but who also studies a kind of computer that's so modern it doesn't even exist yet.

There was understandable alarm in the U.K. earlier in the week when a drone reportedly hit a passenger plane coming in to land at London's Heathrow airport. But after examining Sunday's events more closely, a government minister on Thursday speculated that rather than a drone, the object may have actually been a plastic bag. While there've been hundreds of apparent near misses between planes and drones over the last couple of years, initial news reports regarding the recent Heathrow incident suggested an actual collision had taken place for the first time. The aircraft, a British Airways Airbus A320 with 132 passengers on board, landed safely. The pilot had said that as the plane came in on its final approach, it hit what may have been a drone flying at an altitude of about 1,700 feet.

Nasa has announced that it has found evidence of flowing water on Mars. Scientists have long speculated that Recurring Slope Lineae -- or dark patches -- on Mars were made up of briny water but the new findings prove that those patches are caused by liquid water, which it has established by finding hydrated salts. Several hundred camped outside the London store in Covent Garden. The 6s will have new features like a vastly improved camera and a pressure-sensitive "3D Touch" display

Have you heard the one about the biologist, the physicist, and the mathematician? They're all sitting in a cafe watching people come and go from a house across the street. Two people enter, and then some time later, three emerge. The physicist says, "The measurement wasn't accurate." The biologist says, "They have reproduced."