Magnetotactic bacteria Magnetotactic bacteria (or MTB) are a polyphyletic group of bacteria discovered by Richard P. Blakemore in 1975, that orient along the magnetic field lines of Earth's magnetic field. To perform this task, these bacteria have organelles called magnetosomes that contain magnetic crystals. The biological phenomenon of microorganisms tending to move in response to the environment's magnetic characteristics is known as magnetotaxis (although this term is misleading in that every other application of the term taxis involves a stimulus-response mechanism). In contrast to the magnetoception of animals, the bacteria contain fixed magnets that force the bacteria into alignment — even dead cells align, just like a compass needle. The alignment is believed to aid these organisms in reaching regions of optimal oxygen concentration.
Knot theory A knot diagram of the trefoil knot Knots can be described in various ways. Given a method of description, however, there may be more than one description that represents the same knot. The Experiment Is on Us: Science of Animal Testing Thrown Into Doubt (Photo: ressaure)New scientific research has cast grave doubt on the safety testing of hundreds of thousands of consumer products, food additives and industrial chemicals. Everyday products, from soft drinks and baby foods, to paints, gardening products, cosmetics and shampoos, contain numerous synthetic chemicals as preservatives, dyes, active ingredients, or as contaminants. Official assurances of the safety of these chemicals are based largely on animal experiments that use rabbits, mice, rats and dogs.
10 Futuristic Materials Lifeboat Foundation Safeguarding Humanity Skip to content Switch to White Digital Drawing Board Creates Objects in Stunning 3D Detail ETOS, or Electronical Tool for Object Sketching, is a tool for designers and architects that lets them see their creations in three dimensions without the need for 3D glasses. The tool uses the familiar shape of a pen and the intuitive function of a touch interface to bring sketches into the real world. The drawing board takes the form of a tablet computer with a built-in stand formed from its folded cover. It displays objects in 3D using lenticular lens technology and motion tracking, which also allows users to move the shapes around with their hands. The pen-shaped input tool performs basic editing functions that are selected by simply turning it along the horizontal or vertical axis. Secondary functions can be selected by tapping the touch screen with 1-4 fingers.
Reprogrammed bacterium speaks new language of life - life - 17 October 2013 Read full article Continue reading page |1|2 Read more: To read a fuller version of this story, click here Eat, Drink and Live Forever: Immortality is 20 Years Away It seems that we’ve been edging toward becoming a race of cyborgs for a number of years. Medical advances like replacement limbs and joints, cochlear implants, and artificial organs are already being used. Improving medical technology and our understanding of anatomy will continue to drive the human race toward immortality, according to scientist Ray Kurzweil. He believes that within 20 years, there will be no need for humans to face death at all. Nanotechnology will be applied to create artificial vital organs and even artificial blood cells. Kurzweil and other scientists believe that by using nanotechnology, we can reprogram our bodies’ “stone-age software” to halt the aging process, then do away with death altogether.
A bees-eye view: How insects see flowers very differently to us By MICHAEL HANLON Last updated at 08:52 08 August 2007 To the human eye, a garden in bloom is a riot of colour. Flowers jostle for our attention, utilising just about every colour of the rainbow. Appendicitis? Human Appendix Maybe Not Useless After All For a long time, we’ve believed that the human appendix was more or less good for nothing. Darwin postulated that the appendix was a remnant of evolution that was no longer needed. But for the first time, researchers are actually taking a close look at the appendix and its function. And they’ve come to believe that it is, after all, good for something: it may help to restock the stomach with good bacteria after an illness, like a bout of diarrhea. (image via: ashe-villain) Scientists and researchers from Duke University Medical Center, the University of Arizona and Arizona State University collaborated on the study, which concluded that not only is the appendix not useless – it’s also been around far longer than anyone previously thought.
BBC Nature - Dinosaur gases 'warmed the Earth' 7 May 2012Last updated at 10:43 By Ella Davies Reporter, BBC Nature Apatosaurus, formerly known as Brontosaurus, produced a lot of wind Giant dinosaurs could have warmed the planet with their flatulence, say researchers. British scientists have calculated the methane output of sauropods, including the species known as Brontosaurus. By scaling up the digestive wind of horses, they estimate that the total population of dinosaurs, produced 520 million tonnes of gas annually.
Ancient antibiotic-resistant bacteria found in isolated cave - Technology & Science The samples were collected from a part of Lechuguilla Cave in Carlsbad Cavern National Park in New Mexico that has been cut off from any input from the surface for four million to seven million years. (Max Wisshak/speleo-foto.de/McMaster University) Bacteria that have never before come in contact with humans, their diseases or their antibiotics, but are nevertheless resistant to a variety of antibiotics, have been discovered in a U.S. cave. "This supports a growing understanding that antibiotic resistance is natural, ancient," and an integral part of the genetic heritage of microbes, suggest researchers from McMaster University in Hamilton, Ont. and the University of Akron in Akron, Ohio, in a new study published this week in the journal PLoS ONE. Scientists have long debated the relative roles of humans and nature in the evolution and spread of antibiotic-resistant bacteria, which can pose a serious problem in the treatment of diseases. 2 new kinds of antibiotic resistance
Six-Legged Giant Finds Secret Hideaway, Hides For 80 Years : Krulwich Wonders... No, this isn't a make-believe place. It's real. They call it "Ball's Pyramid." It's what's left of an old volcano that emerged from the sea about 7 million years ago.