Eyes 500 Million Years Old, Australian Scientist Says | Paleontology Prof Trevor Lamb of the Australian National University has published a major scientific review of the origin of the vertebrate eye and vision, summarizing the results of hundreds of studies. The origin of vertebrates, over a time-scale from roughly 700 to 400 million years ago. The red curve indicates our direct ancestors, beginning with early metazoans, and the numbers along the curve denote major branchings that are significant to the evolution of the vertebrate eye (Trevor D. Prof Lamb said that the eyes are one of our most remarkable and precious organs, yet their origins have been shrouded in mystery until quite recently. “There are profound questions about the eye which are still not easy to answer because it appeared so very long ago. The deep origins of ‘sight’ go back more than 700 million years when the earth was inhabited only by single-celled amoeba-like animals, algae, corals and bacteria. “For the first time animals begin to ‘see’ the complex landscape which they inhabit.”
Aproximación al Estudio de los Restos Momificados * Estudiante de la Universidad de Buenos Aires, Facultad de Filosofía y Letras. Ciencias Antropológicas - Orientación Arqueológica. ** Estudiante de la Universidad de Buenos Aires, Facultad de Filosofía y Letras. Ciencias Antropológicas - Orientación Sociocultural. ÁREA TEMÁTICA: BIOARQUEOLOGIA Palabras Clave: Momificación - Estudio - Conservación - Metodología Introducción: Se entiende por MOMIA a todo cadáver bien conservado, en el cual se observan presentes tejidos blandos, músculos, cabellos, piel, etc. La palabra Momia es originaria de Persia y deriva de la palabra MUMMEIA o MUM, que significa asfalto o piche, sustancia empleada para tratar los cuerpos. 6 Things That Shouldn't Explode (But Did Anyway) Michael Bay is right: Somewhere, right now, something is exploding. And we're not talking bombs and tankers either. As it turns out, there are objects all over the place that will suddenly explode the shit out of themselves for absolutely no reason at all, and often when you least expect it. Things like... Imagine this scene: You sleep through your alarm and have to skip a shower to make the bus on time, only the elevator to your apartment jams and you miss the bus anyway and have to take a cab. Basically you are Peter Parker. Utterly defeated, you sink into your ergonomically designed desk chair, which then blows the fuck up like Danny Glover's toilet in Lethal Weapon 2. Sound like John Woo's Office Space? "I heard a sonic boom and suddenly my asshole was pregnant." How worried should you be? We suppose that should make us feel better, but all we can think of is if it happens tomorrow, we'll have the added bonus of going down as the first person in history to die from anal chair rape.
5 Amazing Abandoned Wastelands ... Within Walking Distance Abandoned places have a certain exotic appeal. There's something in these haunting images that speaks to us about the crumbling of society's facades, the fleeting nature of civilization, the implacable will of nature and the ability to throw bottles at shit without The Man giving you guff. But short of something horrible, like a major apocalyptic disaster or a mid-length hike, how could you ever get to see the post-apocalyptic world of tomorrow, today? Well, hell, son: These things are all around you. Some of the craziest abandoned places in the world are here in the cities we live in, in some cases literally right beneath your feet at this very moment. #5. North Brother Island is a 20-acre plot of land in New York that lies completely empty. In the 19th century, a hospital for infectious diseases was housed on North Brother Island. "Triple" is perhaps aiming a tad low. Unfortunately for breathless blue-eyed vixens everywhere, the public is not allowed to visit the island. #4. #3.
5 Real Animal Friendships Straight Out of a Disney Movie Cartoons notwithstanding, we are generally raised with the knowledge that animals kill one another. The process is messy, but it's all a part of an intricate balance; the death of one creature provides life for another. But just sometimes, vicious carnivores of the world take an appraising look at centuries of biological necessity, then turn their back on it and say, "Screw that noise, let's be friends." #5. Snake Decides a Hamster Is Better as a Roommate Hamsters, like most rodents, are the meal of choice for many snakes. And then there's Japan. Aochan is a Japanese rat snake held at a Tokyo zoo. So they took a female dwarf hamster, dropped her into Aochan's cage and waited for nature to take its course. Then pulled the blanket over his head and gave him a Dutch Oven. Did Aochan fly into a mindless rage, seeing his pride as a rat snake being torn to shreds by this overtly friendly furball? We feel it's worth noting that Aochan wasn't just a random snake that likes to eat rodents. #4. #3.
Two Billion Year Old Fossils Point to Early Terrestrial Life | Paleontology A new study, published in the journal Precambrian Research, describes evidence that primitive forms of life existed on land 2.2 billion years ago. Bright, irregularly shaped structures are Diskagma buttonii (Gregory J. Retallack et al) New evidence involves very small fossils connected into bunches by threads in the surface of an ancient soil from Hekpoort Formation near Waterval Onder, South Africa. “They have been named Diskagma buttonii, meaning ‘disc-shaped fragments of Andy Button,’ but it is unsure what the fossils were,” explained lead author Prof Gregory Retallack of the University of Oregon. “They certainly were not plants or animals, but something rather more simple.” Diskagma buttonii are very small – about 0.3 – 1.8 mm long. Prof Retallack said that there is independent evidence for cyanobacteria, but not fungi, of the same geological age, and these new fossils set a new and earlier benchmark for the greening of the land. Reconstruction of Diskagma buttonii (Gregory J.
Grand prismatic spring (8 votes, average: 4.50 out of 5) Loading ... Posted in Images on August 1st, 2008 by egosumnemo | Report This Post | Add to favoritesTags: Nature, Science! The vivid colors in the spring are the result of pigmented bacteria in the microbial mats that grow around the edges of the mineral-rich water. The deep blue color of the water in the center of the pool results from a light-absorbing overtone of the hydroxy stretch of water. Though this effect is responsible for making all large bodies of water blue, it is particularly intense in Grand Prismatic Spring because of the high purity and depth of the water in the middle of the spring. en.wikipedia.org/wiki/Grand_Prismatic_Spring
6 Ridiculous Sex Myths (That Are Actually True) The only thing more awesome than an urban legend turning out to be true is if that same legend involves some sort of nefarious sex or groin related hilarity. Luckily, all of these qualify. The Legend: "Dude, I can totally tell he's gay! Look at his fingers!" This sounds like one of those playground urban myths that adolescent males use as an excuse to punch each other. Yeah, right. The Truth: Incredibly, this is a real thing. Apparently if you have a longer ring finger, it means you got more testosterone as a fetus and are more likely to be hyperactive, aggressive and disgusted by anything featuring Hugh Grant. A longer index finger, on the other hand, means more estrogen, making you more neurotic and sensitive. Actually, no. So... how far into this entry did you get before you stopped to look at your fingers? The Dong Stuck in a Pool Filter So you're swimming around the pool and you pass by the humming filter, sucking debris out of the water. "I bet I'll never have to touch some dude's dong."
7 (Thankfully) Extinct Giant Versions of Modern Animals The animal kingdom is loaded with some pretty formidable creatures, a few of which we as humans are only barely able to keep in line even with modern technology. As it turns out, many of these species are the diminutive descendents of giants so mind bogglingly huge and terrifying that they could probably take over the entire world with minimal effort. Meganeura, The Giant Dragonfly Meganeura were enormous dragonfly-like insects with wingspans the length of an average toddler, making them among the largest flying predatory insects in the history of the world. Their diet consisted mainly of other insects, small amphibians and the dreams of children. Some scientists think that Meganeura were actually too big to be able to survive in the current atmosphere, citing the higher oxygen concentration in the prehistoric world as the only way an insect its size would be able to breathe in enough to support its massive body. Why it's a Good Thing They're Dead: That. Did we mention the claws? Exhibit A.