Category: Science

The Lightbulb Goes Off.


“The researchers used a new technique to record the footage: a super-sensitive fluorescent probe that detects neuron activity. That lets us see neurons glowing when they’re active — and the cascade of light you see…is the neuronal response of a zebrafish responding to the presence of its prey. In other words, you’re seeing what the fish thinks when it sees its lunch.”

Also in decoding-the-brain news, Japanese scientists visually capture the creation of a zebrafish’s thought. “[W]e shouldn’t play this down: this is a fundamental leap forward in our understanding of how brains work.”

Sail on, Sunjammer.

“The Sunjammer mission – the name is borrowed from an Arthur C. Clarke short story about an interplanetary yacht race — will unfurl a solar sail that dwarfs those that have thus far been tested in space. Where NanoSail-D’s diminutive sail measured just 100 square feet and Japan’s IKAROS measures something like 2,000 square feet, Sunjammer’s sail possesses a total surface area of nearly 13,000 square feet. Yet collapsed it weighs just 70 pounds and takes up about as much space as a dishwasher, making it easy to stow in the secondary payload bay of a rocket headed to low Earth orbit.“

Popular Science previews the flight of NASA’s Sunjammer, set for launch in 2014. “The destination for Sunjammer is the Earth-Sun Lagrange Point 1, a gravitationally stable spot way out there between us and our nearest star…Sunjammer will be carrying the cremated remains of various individuals, including Star Trek creator Gene Roddenberry and his wife Majel Barrett Roddenberry.”

The Columbian Hills.

“The astronauts’ namesakes are situated within the Red Planet’s Gusev crater, about two miles away from where the Mars Exploration Rover Spirit landed in 2004. And they were, for the rover and its earthly audience, the most striking feature on the observable Martian surface.”

An auspicious site for New Rome: Seven hills on Mars are named after the fallen astronauts of Columbia. “Spirit would go on to spend several years exploring the Columbia Hills until, struggling in the Martian soil, it would finally cease to function in 2010. Which — striving and striving, until you can strive no more — seems an appropriate tribute to seven people who gave their lives so that the rest of us might forge ahead.”

HAL’s acting squirrely.

“Deception is not something that comes very naturally to today’s artificial intelligence programs. For most robots, it’s hard enough to navigate the world the way it is without introducing fantasies about the way it’s not into the equation. So to help robots get the hang of misleading others, the team has turned to the squirrel, or ‘forest liar,’ to give robots the tools they need to learn the subtle arts of deception.”

It can only be attributable to human error: Also in the “This will end badly someday” department, programmers at Georgia Tech teach robots how to lie. No way this will cause problems. Wait, just a moment…just a moment…I’ve just picked up a fault in the AE35 unit. It’s going to go a hundred percent failure within seventy-two hours.

570 Channels (And Nothin’ On).

“‘We don’t know whether the media multitasking is causing symptoms of depression and social anxiety, or if it’s that people who are depressed and anxious are turning to media multitasking as a form of distraction from their problems,’ Becker said in a statement.”

And here I thought Netflix and Warcraft went so well together: A new Michigan State study finds a correlation between depression and multi-tasking media. I wonder if the obverse is true also. One of the many reasons I love seeing a movie in the theater is that (ideally) nothing else but the film is impinging on my attention.

Warp Speed…at a Price.

“‘Remember, nothing locally exceeds the speed of light, but space can expand and contract at any speed,’ White told io9. ‘However, space-time is really stiff, so to create the expansion and contraction effect in a useful manner in order for us to reach interstellar destinations in reasonable time periods would require a lot of energy.'”

Just re-reading The Forever War at the moment, so this seems very apropos. io9 looks into the recent possible breakthrough on a functioning warp drive. “Mathematically, the field equations predict that this is possible, but it remains to be seen if we could ever reduce this to practice.“

Of course, while mathematicians might have gotten around the “ridiculous amounts of energy required” problem, there’s now the new issue of ridiculous amounts of energy expended — in a lethal frontward cone. “When the Alcubierre-driven ship decelerates from superluminal speed, the particles its bubble has gathered are released in energetic outbursts. In the case of forward-facing particles the outburst can be very energetic — enough to destroy anyone at the destination directly in front of the ship. ‘Any people at the destination,’ the team’s paper concludes, ‘would be gamma ray and high energy particle blasted into oblivion due to the extreme blueshifts for [forward] region particles.'”

A Passage to Tharsis.

“‘The ticket price needs to be low enough that most people in advanced countries, in their mid-forties or something like that, could put together enough money to make the trip,’ he said, comparing the purchase to buying a house in California.”

If you’d prefer to stay within system instead, SpaceX founder Elon Musk sets the cost of a one-way ticket to Mars at $500,000. “‘Some money has to be spent on establishing a base on Mars. It’s about getting the basic fundamentals in place,’ Musk said. ‘That was true of the English colonies [in the Americas]; it took a significant expense to get things started. But once there are regular Mars flights, you can get the cost down to half a million dollars for someone to move to Mars. Then I think there are enough people who would buy that to have it be a reasonable business case.” Start saving up, y’all — Get there before the religious zealots, er, Pilgrims, move in. Update: More details on Musk’s proposal.

Secrets of the Supercut.


“Many supercuts provide hard evidence of the existence of tropes long suspected but never quite proved: imperiled characters fretting that they have no cellphone signal; high-tech investigators asking their imaging software to “enhance“; action movie toughs girding for battle by announcing, “We’ve got company.” But what motivates the supercutter to slog through hours of footage to compile these minute observations? And what distinguishes the masters of the form?“

In Slate, old friend Seth Stevenson surveys the practice and methodology of supercuts. At the very least it’s both funny and instructive to see how many times, to take the example of ST:TNG, Worf gets denied and bad things happen to Geordi.

A Planet Gone Ronin.

“I find this whole thing amazing. It wasn’t that long ago that the only planets we knew of orbited the Sun. The first exoplanets—planets orbiting other stars—were found in the early 1990s, and now we know of hundreds of them!…And now here’s one close by that doesn’t even have a star to call its own. It’s incredible.“

Astronomers discover rogue planet CFBDSIR2149 a mere 75 light years away — not to be confused with Melancholia, of course, which is hiding behind the sun and will soon ruin weddings and kill us all in slow motion.