Why do some animals play dead when threatened by a predator? The commonly held belief is that many animals including snakes, bison, chickens, rabbits, and, of course, opposum act dead to discourage those who would eat them. Recent research suggests that this isn't always the case. For example, the Parachromis friedrichsthalii
fish acts dead in order to hunt. Smaller fish move in to take a nibble and wham! Other animals, such as hognose snakes, do exhibit what scientists call "tonic immobility" upon sensing a predator, sometimes delivering an Oscar-worthy performance. From Science News:
When a hognose snake that's facing a predator flips belly-up, its mouth opens and stays agape, sometimes oozing drops of blood. And the snake defecates or otherwise releases an unappetizing smell. "It's spectacular," says Gordon Burghardt of the University of Tennessee in Knoxville.
Grossly dead as the animal may look, Burghardt and Harry Greene, now at Cornell University, found that it's paying attention. Even snakes just 2 weeks old resurrect themselves sooner when a nearby human is looking away from them rather than directly at them.
Europe's grass snake puts on an even more realistic death act, says Patrick Gregory of the University of Victoria in British Columbia. When he caught his first grass snake years ago in France, it went limp. "I thought I'd accidentally killed it," he says. A death-feigning grass snake stays in character, not flopping back to its original position after it is turned over.
The relationships among the great range of freezing behaviors have yet to be clarified. "I see them as part of a continuum," Burghardt says.
Many questions remain: Are some of the activities seizures? A mental meltdown in response to disorientation? And how do some feigners remain conscious of vital details such as the gazes of observers?
I asked Amy Parness, the co-founder of Sparkle Labs, maker of fantastic educational electronics kits, to write a Medium post about gender and the business of being a maker business person. Her terrific essay calls out the problems with “pink girly engineering kits.” From Medium:
Zero UI is the new term for “invisible interfaces”—what happens in the future when all the clicking and tapping and typing is history: “If you look at the history of computing, starting with the jacquard loom in 1801, humans have always had to interact with machines in a really abstract, complex way.” [Fast Company]
CEO Dick Costolo will resign, to be replaced in the interim by Jack Dorsey
Watching Netflix, Hulu or other streaming services can unfortunately be difficult while traveling outside the US. Rather than bypass these restrictions with the help of a complex and slow VPN, choose a faster and simpler solution with Getflix. Instead of rerouting all your Internet traffic through a different server, this handy service only routes the […]
Shake, stir, and muddle your way to delicious homemade cocktails with this must-have bar set. Expect only the finest quality tools from MakersKit — enabling you to unleash your inner mixologist.Top 12 Favorite Things of 2014, Sunset MagazineQuart-size vintage-style Mason jar shakerRetro double jigger for accurate measurementsStrainer & spouts for a mixologist-style smooth pourHardwood muddler […]
The Lytro Illum dares to be different, boasting even more robust features than its first generation predecessor and a sleek design reminiscent of professional DSLRs. What’s so cool about it? Most cameras capture the position of light rays, producing a statoc 2D image.