The multiverse in three parts: Brian Greene at TED2012 Photo: James Duncan Davidson Superstring theorist and physicist and the co-founder of the World Science Festival, Brian Greene splits his visually rich, action-packed talk into three distinct sections, all in the name of convincing us of the existence of the multiverse, the possibility that way beyond the earth, the milky way, we’ll find that our universe is part of a vast complex of universes we call the multiverse. Part One: The history and mystery In 1929, the astronomer Edwin Hubble discovered that distant galaxies were rushing away from us; that space was stretching and expanding. Fast forward to the 1990s, when two teams of Nobel Prize-winning astronomers aimed to measure the rate at which the expansion of the universe is slowing. Now here’s Greene’s mystery. Part Two: The solution to the mystery Now, Greene gives a quick recap of his own topic of research: string theory, an approach to reaching Einstein’s dream of a unified theory of physics. Of course, questions remain.
Largest Ever Water Reservoir Discovered in Space The reservoir is gigantic, holding 140 trillion times the mass of water in the Earth's oceans, and resides 10 billion light years away. Since astronomers expected water vapor to be present even in the early universe, the discovery of water is not itself a surprise, the Carnegie Institution, one of the groups behind the findings, said. The water cloud was found to be in the central regions of a faraway quasar. Quasars contain massive black holes that are steadily consuming a surrounding disk of gas and dust; as it eats, the quasar spews out amounts of energy, the institution said in its statement. The quasar where the gigantic water reservoir is located is some 12 billion years old, only 1.6 billion years younger than the Big Bang. The discovery was part of a larger study of the quasar named APM 08279+5255, where the black hole is 20 billion times greater than the Sun. The environment around this quasar is very unique in that it's producing this huge mass of water.
Welcome to the Multiverse Theoretical cosmologist isn’t one of the more hazardous occupations of the modern world. The big risks include jet lag, caffeine overdose, and possibly carpal tunnel syndrome. It wasn’t always so. On February 17, 1600, Giordano Bruno, a mathematician and Dominican friar, was stripped naked and driven through the streets of Rome. Then he was tied to a stake in the Campo de’ Fiori and burned to death. These days, cosmologists like me may be safer, but our ideas have grown only more radical. Also like Bruno, cosmologists are reaching far beyond what observational evidence can tell them. The extent of what astronomers can see is frustratingly limited by the speed of light: one light-year (about six trillion miles) per year. Obviously, we don’t know what the unobservable part of the universe looks like. Here we are not talking about disconnected universes, but rather what we cosmologists call pocket universes. That’s where the multiverse comes from. Next page: Universe gets diverse
Extensive water in Mars' interior -- Science & Technology © NASAMars, as seen by the Hubble Space Telescope. Until now, Earth was the only planet known to have vast reservoirs of water in its interior. Scientists analyzed the water content of two Martian meteorites originating from inside the Red Planet. They found that the amount of water in places of the Martian mantle is vastly larger than previous estimates and is similar to that of Earth's. The results not only affect what we know about the geologic history of Mars, but also have implications for how water got to the Martian surface. The data raise the possibility that Mars could have sustained life. The research was led by former Carnegie postdoctoral scientist Francis McCubbin, now at the University of New Mexico. The scientists analyzed what are called shergottite meteorites. "We analyzed two meteorites that had very different processing histories," explained Hauri. "There has been substantial evidence for the presence of liquid water at the Martian surface for some time," Hauri said.
MIT: "New Universes are Being Constantly Created" In this view, “nature gets a lot of tries — the universe is an experiment that’s repeated over and over again, each time with slightly different physical laws, or even vastly different physical laws,” says Jaffe. Some of these universes would collapse instants after forming; in others, the forces between particles would be so weak they could not give rise to atoms or molecules. However, if conditions were suitable, matter would coalesce into galaxies and planets, and if the right elements were present in those worlds, intelligent life could evolve. Some physicists have theorized that only universes in which the laws of physics are “just so” could support life, and that if things were even a little bit different from our world, intelligent life would be impossible. In that case, our physical laws might be explained “anthropically,” meaning that they are as they are because if they were otherwise, no one would be around to notice them. The Daily Galaxy via MIT News Office
Life on Mars found but destroyed by mistake - Sci/Tech Bungling NASA scientists are believed to have found tiny live microbes on Mars - but mistakenly killed them by boiling them alive, a media report said. Bungling NASA scientists are believed to have found tiny live microbes on Mars - but mistakenly killed them by boiling them alive, a media report said Saturday. Two spacecraft that landed on the Red Planet in 1976 are now thought to have detected microbes in Martian soil. But scientists at the time failed to spot the signs of life - and cooked the bugs at 160 degrees Centigrade during experiments, The Sun reported. Now an international team has used modern techniques to re-examine data collected by the two unmanned Viking probes. Biologist Joseph Miller, of the University of Southern California, said: "I'm 99 percent sure there's life there. During the 1976 mission, nutrients were added to the Martian soil. Experts dismissed the possibility that the gas came from bugs.
Is an Adjacent Universe Causing the Dark Flow of Hundred of Millions of Stars at the Edge of the Observable Universe? Or, Might It Be Something Else Back in the Middle Ages, maps showed terrifying images of sea dragons at the boundaries of the known world. Today, scientists have observed strange new motion at the very limits of the known universe -- kind of where you'd expect to find new things, but they still didn't expect this. A huge swathe of galactic clusters seem to be heading to a cosmic hotspot and nobody knows why. The unexplained motion has hundreds of millions of stars dashing towards a certain part of the sky at over eight hundred kilometers per second. Not much speed in cosmic terms, but most preferred cosmological models have things moving in all directions equally at the extreme edges of the universe. "The clusters show a small but measurable velocity that is independent of the universe's expansion and does not change as distances increase," says lead researcher Alexander Kashlinsky at NASA's Goddard Space Flight Center. Hot X-ray-emitting gas in a galaxy cluster scatters photons from the cosmic microwave background.
Meteoroid impact triggers bright flash on the moon CAPE CANAVERAL, Florida (Reuters) - An automated telescope monitoring the moon has captured images of an 88-pound (40 kg) rock slamming into the lunar surface, creating a bright flash of light, NASA scientists said on Friday. The explosion on March 17 was the biggest seen since NASA began watching the moon for meteoroid impacts about eight years ago. So far, more than 300 strikes have been recorded. "It exploded in a flash nearly 10 times as bright as anything we've ever seen before," Bill Cooke, with NASA's Meteoroid Environment Office at the Marshall Space Flight Center in Huntsville, Alabama, said in a statement. A NASA satellite orbiting the moon is now on a hunt for the newly formed crater, which scientists estimate could be as wide as 66 feet. The flash was so bright that anyone looking at the moon at the moment of impact could have seen it without a telescope, NASA said. But not always. (Editing by Kevin Gray and Doina Chiacu)
Top 5 Reasons We Might Live in a Multiverse | Hidden Universes The universe we live in may not be the only one out there. In fact, our universe could be just one of an infinite number of universes making up a "multiverse." Though the concept may stretch credulity, there's good physics behind it. And there's not just one way to get to a multiverse — numerous physics theories independently point to such a conclusion. In fact, some experts think the existence of hidden universes is more likely than not. Here are the five most plausible scientific theories suggesting we live in a multiverse: 1. Scientists can't be sure what the shape of space-time is, but most likely, it's flat (as opposed to spherical or even donut-shape) and stretches out infinitely. So if you look far enough, you would encounter another version of you — in fact, infinite versions of you. 2. In addition to the multiple universes created by infinitely extending space-time, other universes could arise from a theory called "eternal inflation." 3. 4. 5.