Tag: science

  • Herman Melville on the Nature of Color

    From Moby Dick, chapter 42, “The Whiteness of the Whale”:

    Is it that by its indefiniteness it shadows forth the heartless voids and immensities of the universe, and thus stabs us from behind with the thought of annihilation, when beholding the white depths of the milky way? Or is it, that as in essence whiteness is not so much a color as the visible absence of color, and at the same time the concrete of all colors; is it for these reasons that there is such a dumb blankness, full of meaning, in a wide landscape of snows – a colorless, all-color of atheism from which we shrink? And when we consider that other theory of the natural philosophers, that all other earthly hues – every stately or lovely emblazoning – the sweet tinges of sunset skies and woods; yea, and the gilded velvets of butterflies, and the butterfly cheeks of young girls; all these are but subtile deceits, not actually inherent in substances, but only laid on from without; so that all deified Nature absolutely paints like the harlot, whose allurements cover nothing but the charnel-house within; and when we proceed further, and consider that the mystical cosmetic which produces every one of her hues, the great principle of light, for ever remains white or colorless in itself, and if operating without medium upon matter, would touch all objects, even tulips and roses, with its own blank tinge – pondering all this, the palsied universe lies before us a leper; and like wilful travellers in Lapland, who refuse to wear colored and coloring glasses upon their eyes, so the wretched infidel gazes himself blind at the monumental white shroud that wraps all the prospect around him. And of all these things the Albino Whale was the symbol. Wonder ye then at the fiery hunt?

  • Cryptochrome

    Research continues on whether humans (and other animals) have the ability to perceive magnetic fields:

    Many birds have a compass in their eyes. Their retinas are loaded with a protein called cryptochrome, which is sensitive to the Earth’s magnetic fields. It’s possible that the birds can literally see these fields, overlaid on top of their normal vision. This remarkable sense allows them to keep their bearings when no other landmarks are visible.

    But cryptochrome isn’t unique to birds – it’s an ancient protein with versions in all branches of life. In most cases, these proteins control daily rhythms. Humans, for example, have two cryptochromes – CRY1 and CRY2 – which help to control our body clocks. But Lauren Foley from the University of Massachusetts Medical School has found that CRY2 can double as a magnetic sensor.

    Vision is amazing, even more so when you take into account the myriad other things that animals and insects can detect beyond just our “visible” EMF spectrum. See also: box jellyfish with their surprisingly complex (and human-like) set of 24 eyes.

  • 26 Terabit-per-second Laser

    Researchers at the Karlsruhe Institute of Technology set a new record by transmitting 26 terabits of a data per second (“the entire Library of Congress in 10 seconds!” as the usual benchmark goes) using a single laser and a clever FFT and frequency comb technique to split the light into 300+ discrete colors:

    The Fourier transform is a well-known mathematical trick that can in essence extract the different colours from an input beam, based solely on the times that the different parts of the beam arrive. The team does this optically – rather than mathematically, which at these data rates would be impossible – by splitting the incoming beam into different paths that arrive at different times, recombining them on a detector. In this way, stringing together all the data in the different colours turns into the simpler problem of organising data that essentially arrive at different times.

    Neat.

    (Via ACM TechNews)

  • Forget the Firetruck: Future Firefighters May Use Ghostbusters-Like Electric Backpacks

    From Discover:

    This futuristic method is based on a centuries-old observation that electric fields can do funny things (videos) to flames, making them sputter and even snuffing them out.

    The researchers’ early-stage prototype consists of a 600-watt amplifier hooked up to a electric beam-shooting wand, according to their presentation at the American Chemical Society meeting earlier this week.  In tests, they were able to quickly zap out flames over a foot high.

    I look forward to the day when I can dial 911 and get the ArcAttack guys over to put out the blaze!

  • Donald Duck Discovered Methylene

    Actually, he does. Donald Duck accidentally (and somewhat accurately) described the chemical compound methylene nearly two decades before real-world scientists:

    In 1963, the Disney Studio learned just how wide and faithful a readership [Carl] Barks had. A letter arrived from Joseph B. Lambert of the California Institute of Technology, pointing out a curious reference in “The Spin States of Carbenes,” a technical article soon to be published by P.P. Gaspar and G.S. Hammond (in Carbene Chemistry, edited by Wolfgang Kirmse, New York: Academic Press, 1964). “Despite the recent extensive interest in methylene chemistry,” read the article’s last paragraph, “much additional study is required…. Among experiments which have not, to our knowledge, been carried out as yet is one of a most intriguing nature suggested in the literature of no less than 19 years ago (91).” Footnote 91, in turn, directed readers to issue 44 of Walt Disney’s Comics and Stories. … A year later, the Studio received a letter from Richard Greenwald, a scientist at Harvard. “Recent developments in chemistry have focused much attention to species of this sort,” Greenwald commented. “Without getting technical let me say that carbenes can be made but not isolated; i.e. they cannot be put into a jar and kept on a shell. They can, however, be made to react with other substances. Donald was using carbene in just such a manner, many years before ‘real chemists’ thought to do so.”

    (Via Cracked’s 5 Amazing Things Invented by Donald Duck [Seriously])

  • Optical tweezers and laser tractor beams

    Mind-boggling stuff like this is why I keep reading science journals. We can already use photons to push and pinch things with their tiny mass (amazing enough), but new research is underway in how to pull with photons:

    Light is pushy. The physical pressure of photons is what allows for solar sail space missions that ride on sunlight, and what allows for dreams of lasers that will push those sails even faster. And light can trap objects, too: Optical tweezers can hold tiny objects in place. Pulling an object with light, however, is another matter.  …  Jun Chen’s research team says that the key is to use not a regular laser beam, but instead what’s called a Bessel beam. Viewed head-on, a Bessel beam looks like one intense point surrounded by concentric circles—what you might see when you toss a stone into a lake.

  • Caterpillars whistle for safety

    From the Journal of Experimental Biology comes news that caterpillars are able to force air through their bodies to ‘whistle’ as a defense mechanism when they’re spotted by predators. These aren’t exotic bugs, either: they can be found all over the U.S., even here in Austin, Texas (guess I’d better listen carefully next time I’m in the backyard). From the Nature abstract:

    When under attack, walnut sphinx caterpillars (Amorpha juglandis), whistle. An 1868 Canadian Entomologist paper, “Musical larvae,” first reported these shrieks, but their purpose wasn’t clear.

    Jayne Yack at Carleton University in Ottawa, Canada, and her team now show that the whistle, produced through openings along the body called spiracles, is a defence against predators. Simulated attacks with blunt tweezers caused the caterpillars to pull their heads back, forcing air through two of the spiracles in a succession of squeaks.

    There’s a video of the little guy whistling available in .mov format. I think I’d squeak too if someone was jabbing at me with a pair of forceps…

  • The Unsuccessful Self-Treatment of a Case of Writer’s Block

    Via NCBI ROFL, a single-page paper submitted to the 1974 volume of the Journal of Applied Behavior Analysis, “The Unsuccessful Self-Treatment of a Case of ‘Writer’s Block’”.

    This amazing research was verified and extended upon in 2007: “A Multisite Cross-Cultural Replication of Upper’s (1974) Unsuccessful Self-Treatment of Writer’s Block

  • Cryovolcano on Titan

    Volcanoes spewing ice and slush instead of lava on Titan! From NASA: Cassini Spots Potential Ice Volcano on Saturn Moon

    Scientists have been debating for years whether ice volcanoes, also called cryovolcanoes, exist on ice-rich moons, and if they do, what their characteristics are. The working definition assumes some kind of subterranean geological activity warms the cold environment enough to melt part of the satellite’s interior and sends slushy ice or other materials through an opening in the surface.

    I suddenly have a hankering to play Metroid…

  • Ancient astronomy: Mechanical inspiration

    New research on the Antikythera mechanism hints that we might be looking at its use and meaning from the wrong perspective. From Nature:

    Now, however, scientists delving into the astronomical theories encoded in this quintessentially Greek device have concluded that they are not Greek at all, but Babylonian — an empire predating this era by centuries. This finding is forcing historians to rethink a crucial period in the development of astronomy. It may well be that geared devices such as the Antikythera mechanism did not model the Greeks’ geometric view of the cosmos after all. They inspired it.