This impossible triangle is also called a Penrose triangle {wiki} or tribar. These step-by-step instructions will help you impress and baffle your kids. Link -via the Presurfer

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This guy rigged up his Wiimote to control his curtains! Then he posted how he did it. Link -via Cynical-C

A cactus has been found growing in Australia with spines tough enough to penetrate tires! It’s been known to kill koalas, who develop infections because the spines are so difficult to remove.

Once spines of the hudson pear cactus penetrate the skin, they often require pliers to pull them out. It is potentially the worst cactus species to spread in Australia since prickly pear in the 1920s.

Primary Industries Department Biosecurity Queensland land protection officer Jodie Sippel said yesterday there was anecdotal evidence the cactus had caused a fatality at Lightning Ridge in NSW when a person fell into a clump of pear and had a heart attack.

The Hudson pear cactus is an invasive species native to Mexico. http://www.news.com.au/story/0,23599,23283785-2,00.html -via J-Walk Blog

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The Evolution of Dance is the most-viewed YouTube video ever. In this relatively short parody, Optimus Prime shows off his moves! -via Gorilla Mask

Could the traditional Japanese belly warmer become a new fashion trend worldwide? Probably not, but they could help you stay warm in the winter. The idea is that if you keep your torso warm enough, the blood flowing to the rest of your body will stay warm. Link -via Metafilter, where you’ll find more haramaki links.

This photo of a sign in Argentina was posted by Dan Harris. Link -via Digg

John McClane is a hero. He’s saved America over and over.

*In 1988, John McClane defused the hostage crisis at Los Angeles’ Nakatomi Tower.
*In 1990, John McClane foiled a terrorist plot to seize control of Dulles International Airport in Washington, DC.
*In 1995, John McClane foiled the New York Federal Reserve Heist.
*In 2007, John McClane stopped the greatest cyberterrorism conspiracy in history.
*John McClane has defeated terrorists in elevator shafts on numerous occasions.

John McClane will keep us safe from terrorists, like he always has. A tough man for tough times. Yippie-Kay-Yay, America! Link -via Cynical-C

This article has nothing to do with the supernatural; it’s about real bodies that just can’t seem to rest in peace, or at least had to wait for their chance. You are familiar with King Tut’s mummy and Lenin’s corpse, but I bet you haven’t heard about all of these! Link

Disclaimer: I wrote this, with inspiration from Neatorama authors Gail Hapke and JT Pednaud.

Waclaw Sierpinski was the mathematician who first described the fractal that became known as the Sierpienski carpet {wiki}. Andrew Pike has created a tile mosaic portrait of Sierpinski, using Sierpinski carpets! Link -via Dump Trumpet

A bank in Australia has a cute advertising gimmick. They want to make you happy, and figure singing kittens will do the job. Enter your name (as long as it isn’t too long), and the kittens will sing a song for you! http://www.happybanking.com.au/ -via Arbroath

This flash animation by Celarent stars Mario as a Soviet-style worker/hero who fights the evil mushrooms. The look is reminiscent of classic propaganda posters. Music by the Russian Red Army Choir, Proshchanie Slavianki, and Nintendo. Link -via reddit

If you want to cook something new, you know someone out there has done it before. Food Blog Search is a specialized search engine for recipes posted on food blogs. When you’ve got hundreds of recipes for “curry chicken”, you’re bound to find one that fits the ingredients you have on hand. It’s also a way to explore new and different sites about food. And it’s not just recipes! I typed in “Leap Day party” and found lots of interesting posts. Link -via the Presurfer

lowercase L is a blog dedicated to the misuse of the letter L. Blogger William Levin explains:

I have noticed that, when people create handwritten signs, they sometimes choose to capitalize every letter except the letter "L". I can understand using some lowercase letters like "i" and "y", to stylize the handwriting. But why confuse matters by using the only letter that, when lowercase, is identical to an uppercase "I"?

I have seen this before, but I didn’t know it was so common! Link -via mental_floss

George the parrot lost a leg 18 months ago when he was attacked by an unidentified wild animal. Since then, he’s had a hard time getting any sleep, as he tries to balance on one foot. It’s even driven him to swearing! But Dr. Glyn Heath of the University of Salford’s School of Health Care Professions has modeled a prosthetic leg for George. Although Dr. Heath has made many false limbs for animals, this is his first prosthetic for a bird. Link

Two days later, the report came out on George’s reaction to his new leg. He ate it. Link -via Arbroath

Can a woman’s hair really support a man’s weight, as in the story of Rapunzel? Can a carpet ever fly? And how would you steal someone’s voice, like Ursula does in The Little Mermaid? It turns out that some of that magical stuff is actually possible -except for that “happily ever after” part, of course. Link -via Bad Astronomy Blog, where you’ll find some more suggestions for this topic.