Scientists "Delete" HIV Virus From Human DNA For The First Time - Researchers Eliminate HIV Virus From Cultured Human Cells | Guff. Once HIV conquers a human cell, it will stay there forever. It inserts its deadly genome permanently into its victims' DNA, forcing them to require medical treatment for the rest of their life. But now, for the first time, researchers in Philadelphia have found a way to completely delete HIV from human cells by ‘snipping’ them out. The team of Temple University School of Medicine said the breakthrough marks the first successful attempt to eliminate latent HIV-1 virus from human cells – and could be a cure for other latent infections.
‘This is one important step on the path toward a permanent cure for AIDS,' said Kamel Khalili, PhD, Professor and Chair of the Department of Neuroscience at Temple.'It's an exciting discovery, but it's not yet ready to go into the clinic. It's a proof of concept that we're moving in the right direction,' he added. 'Since HIV-1 is never cleared by the immune system, removal of the virus is required in order to cure the disease,' explained Dr Khalili. Why Do Some Living Things Glow?
An underwater glow. A fleeting gleam across a field. These lights seem mysterious, but organisms generate them for practical purposes. Bioluminescence fends off predators, lures prey, and attracts mates. Making light is such a useful trait that it has evolved independently at least 40 times. It occurs most commonly in the ocean, where bioluminescence is often the only source of light. Click each illustration to see it animate Defense Surprise The prey produces a bright flash that startles a predator, making it easy to escape. Warning Gleaming prey signals to a predator that its next meal could taste terrible—or even be toxic. Offense Shock A burst of bright light from a bioluminescent predator stuns prey and leaves it open to attack.
Searchlight A predator turns on its natural spotlight to locate prey in a dark ocean. Reproduction Come-On Flickers of light signal that a bioluminescent insect is ready to meet new mates. Jason Treat and Daniela Santamarina, NGM Staff. A bowling ball and feather fall in world's biggest vacuum chamber. You probably already know how this one ends, but that doesn't make watching it play out any less spectacular. [optional caption text here] Image: [name here]/Shutterstock The combination of bowling ball and feather is the perfect way to demonstrate air resistance, also known as drag.
Because the shape of the feather allows it to endure way more air resistance than the bowling ball, it takes much longer to fall to the ground. British physicist Brian Cox wanted to see this primary-school problem play out in a vacuum, where there is zero air resistance to mess with the results. When not in use, the chamber contains around 30 tonnes of air, but when it’s turned on, all but around 2 grams of air are sucked out to create an artificial vacuum. This is not a rainbow. Roses are red, violets are blue, and purple in a rainbow is a supernumerary hue.
What does that even mean? Watch the latest episode of MinutePhysics to find out. [optional caption text here] Image: [name here]/Shutterstock The rainbow, as we know it, is red, orange, yellow, green, blue, indigo, and violet - ROYGBIV. In the 1660s, when Isaac Newton first saw a rainbow of light split by a prism object, he labelled the colours as red, orange, yellow, green, blue, indigo, and violet.
When you look at a rainbow of light split by a prism, you won't see any purple or pink, because they're only created when you can mix two colours from different ends of the rainbow colour scale. The secret is that a rainbow in the sky is actually a rain-disc, each colour of sunlight reflects back in a bright rimmed disc, and when you combine all of these discs together, you get one big white disc with a colourful disc.
WATCH: Why does your voice sound so different in recordings? Sorry, your voice actually DOES sound like that in real life. This is why. [optional caption text here] Image: [name here]/Shutterstock If you’ve ever heard your voice played back from a recording, you’ll be familiar with how awkward it is - suddenly everything you say sounds higher and more nasal and just wrong, and you're left questioning: "Do I really sound like that? " Unfortunately, yes, as Hank Green explains in the latest episode of the SciShow. This is because when we talk, we’re not only hearing the sound that comes out of our mouths, travels through the air and hits our inner ears, but also the sound that bounces around in our own, fleshy heads before hitting our inner ear.
But there is good news - just because your real voice sounds weird to you, that doesn't mean it's actually bad. Watch the latest episode above to find out more about what you sound like to other people. Making glowing "magical mud" from ordinary potatoes. How the body recognises viruses - The Science Show. Robyn Williams: And now we combine some of those last thoughts; lawyers, France and Melbourne. Though Monash this time. Meet Stephanie Gras, whose field is X-ray crystallography, and whose hero is one Lawrence Bragg. I was telling you that a roomful of lawyers had never heard of Lawrence Bragg, do you find that surprising?
Stephanie Gras: It's a shame. It's not surprising, I don't think so, unfortunately, but it is a shame. He was one of our great scientists for crystallography, but most importantly he is Australian. Robyn Williams: In other words the anniversary is coming up next year. Stephanie Gras: Yes, next year, and this year is the anniversary of the discovery of the X-ray that could be used through crystals and that was by Laue in the same time. Robyn Williams: How many people in France know about Bragg? Stephanie Gras: Well, probably the crystallography community, which is quite big in France, but yes, I don't think it is known by the public unfortunately. Stephanie Gras: Yes. Ice cube experiment › Tricks (ABC Science) The Surfing Scientist › Tricks This classic experiment shows how ice can weld itself together. It was first performed in 1872, but we still don't know precisely how the phenomenon works. By Ruben Meerman Can't see the video? Download an mp4 [30 MB] version of this video.
Ice can melt under pressure and it will refreeze when the pressure is reduced, but while that is all easy enough to say, the science behind it is tricky. ^ to top What's going on? The phenomenon you are witnessing is called 'regelation'. The presence of the wire melts the ice below it and the water above refreezes above. Melting, freezing and the solid state of water are much more complicated than most of us think. For starters, did you know there are at least eleven different types of ice?
A standard, garden-variety ice Ih cube floats in your drink because its volume is about 10 per cent greater than the liquid it was made from. These questions about how water melts and refreezes go back a long way. Tags: physics. Water tractor beam created by Australian scientists in world first. Updated Australian scientists have created the world's first water tractor beam which they hope can be used to clean up oil spills. Physicists at the Australian National University have created certain wave patterns in water that pull objects on the surface towards the source of the waves.
It is hoped the tractor beam would be developed to assist in removing objects adrift on the surface of the ocean. Dr Horst Punzmann is part of the team behind the design. "A tractor beam is a popular term which, I think it captures quite well the basic principle," he said. "You put an object there and it propagates, it floats backwards to the source of the wave. " However, the physicists had been doubtful at first. "First I thought it was impossible and I thought that it was the effect of the boundaries nearby," said Professor Michael Shats, a colleague of Dr Punzmann.
"So the first idea was to build a bigger tank. Despite this, the scientists have admitted they did not fully understand how it worked. Video designed to create a strong natural hallucination. World's Tallest Waterslide: Why You Don't Fall Off. Standing taller than Niagara Falls, a new waterslide — appropriately named Verrückt, which means "insane" in German — opened on Thursday (July 10) in Kansas City, Kansas. The slide stands 168 feet 7 inches (about 51 meters) tall, and is now officially recognized by Guinness World Records as the tallest waterslide in the world. After the first 17-story drop at a 60-degree angle, riders swoop up a hill, before plunging down a 60-foot (18 m) drop and landing safely in a splash pool.
A rider's raft reaches speeds of about 65 mph (29 m/s), and the entire harrowing ride lasts all of 10 seconds. The ride was originally scheduled to open on Memorial Day, but the rafts kept flying off the chute during test runs. So what does it take to keep a raft from picking up too much speed and separating from the chute? It's all about the relationship among gravity, friction and the steepness of the slide, said Gene Van Buren, a physicist at Brookhaven National Laboratory in New York.
Is it safe? How does fluorescence work? New History of Humanity - Astounding Scientific Discoveries. Science Friday. MAN. How taking a bath led to Archimedes' principle. Odyssey.js Scroll. Plymouth Sound, England A nautical chronometer made by Thomas Earnshaw (1749–1828), and once part of the equipment of HMS Beagle The morning of 27 December, the Beagle left its anchorage in the Barn Pool, under Mount Edgecumbe on the west side of Plymouth Sound and set out on its surveying expedition.
St. Jago, Cape Verde Islands modern day Praia It is here that Darwin's description in his published Journal begins. Bahia, Brazil modern day Salvador Due to heavy surf they only stayed at Fernando de Noronha for a day to make the required observations, and Fitzroy decided to make for Bahia, Brazil, to rate the chronometers and take on water. Uruguay Cerro de Montevideo as seen from the city, in 1865.
After storms, the Beagle reached Montevideo on 26 July 1832, and took observations for the chronometers. Much of the second day was taken up with excavating a large skull which Darwin found embedded in soft rock, and seemed to him to be allied to the rhinoceros. Southern tip of South America Australia. Why Nikola Tesla was the greatest geek who ever lived. Additional notes from the author: If you want to learn more about Tesla, I highly recommend reading Tesla: Man Out of Time Also, this Badass of the week by Ben Thompson is what originally inspired me to write a comic about Tesla.
Ben's also got a book out which is packed full of awesome. There's an old movie from the 80s on Netflix Instant Queue right now about Tesla: The Secret of Nikola Tesla. It's corny and full of bad acting, but it paints a fairly accurate depiction of his life. The drunk history of Tesla is quite awesome, too. Ancient Volcanoes Destroyed Ozone. Stem Cell Video Clips.
Physics. Biology.