Category Archives: Science Fact

Cage Match: Quantum Physics vs General Relativity

Quantum physicist and all-round awesome skiffy dude Calvin Johnson is doing a series of posts over at Science in my Fiction* about how quantum field theory–the physics of very small things–clashes with our understanding of gravity, as explained by Einstein’s theory of relativity. The first post just went up. Fascinating stuff, for all y’all fellow physics nerds. Check it out.

This will be the first of three posts on the subject. I’ll include links to the other two here, once they are up.

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*which, btw, is an excellent blog; add it to your bookmarks now. I mean it! (Obligatory disclaimer: I am one of the writers invited to play there but have been a sorry-ass-procrastinator and have yet to actually, y’know, POST there. Ahem.)

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Cosmic fingerprints from before the Big Bang?

This is nifty (h/t Gardner Dozois). Cosmologist Roger Penrose and his associate Vahe Gurzadyan have found concentric rings in the sky, deep in space, which scientists believe are shockwaves arising from the collision of supermassive, galactic black holes in the far distant past.

The currently accepted model of the universe* posits that it started as an infinitely dense point of unimaginably high energy. The early universe expanded much faster than the speed of light, till matter and energy condensed out of their prior entangled state, in a phase known as inflation. This rapid expansion would necessarily have obliterated these rings. Penrose’s model, Conformal cyclic cosmology (CCC), apparently predicts the rings, which suggest that the universe pre-dates the Big Bang—that is, that there was no theoretical beginning to the universe—and thus challenges the standard model, including inflation.

The findings are still preliminary, and a lot more research would need to be done to unseat the currently accepted inflationary model as an explanation for how our universe got to be where it is today. Still, it’s fascinating stuff. If true, it would not only change our understanding of the past, but also our expectation of future events.

Two things intrigue me about this. First, I am fascinated by how the ancient past is etched into the fabric of space. Second, I am impressed as hell that researchers whose only medium of study is the trickle of light emitted long ago by distant suns can extract so much knowledge from it. Here’s to the genius that can tease free such magnificent concoctions—such spires and castles and landscapes of thought—sipping info through such tiny straws.
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*Obligatory cautionary note: layperson’s interpretation here. Apply due salt shakings.

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Life, I tell you! Extraterrestrial…. liiiiiiife!

Science News reports that some very clever people have come up with a laser technique for detecting microbial activity. We can not only use it to, say, detect Martian life from orbit, but even use it to detect life on worlds orbiting other suns! Even better, it uses very inexpensive, off-the-shelf equipment. Which means maybe even some enterprising amateurs could conceivably be the first people to discover extraterrestrial life.

How cool is that?

originally posted on Eat Our Brains, October 2, 2009

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Jet Pack Ahoy

In keeping with our occasional “where’s my flying car?” motif, I thought I’d pass along this little goody. The Denver Post reports that daredevil Eric Scott successfully avoided plummeting to his death in Royal Gorge with a 135-pound rocket-powered backpack strapped to him.

The pack, designed by aerospace engineer Eric Strauss, carried Scott across the 1,500 foot wide, 1,053 foot deep canyon. According to the Post, he had 33 seconds of fuel, and made it across in 25.  Plenty of time to spare!

Troy Widgery, founder of Jetpack International, the company that created the pack, is pursuing a childhood dream. Next up, he says, is a pack with three turbines, capable of staying aloft for nine minutes and crossing the Grand Canyon.

Update: CBS News has the story, too. Both the Denver Post and CBS have video of the flight, and CBS has an interview with Scott. CBS is saying the flight took either 21 or 23 seconds, and he had a total of 30 seconds of hydrogen peroxide fuel. Either way, he made it with about 7 seconds to spare. Heh.

originally posted on Eat Our Brains, Nov 28, 2008

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