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Spacetime invisibility cloaks can hide entire events inside temporal voids

Spacetime invisibility cloaks can hide entire events inside temporal voids
SExpand Invisibility cloaks are taking baby steps from science fiction to science fact. But there's an even stranger and more incredible possibility - an invisibility cloak that works in both space and time, shielding whole events from history itself. The basic idea is surprisingly simple. We see things because our eyes are able to interpret information from visible light. That light travels at, obviously enough, the speed of light, which means we see things once light has traveled from them to our eyes.

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Alcubierre Warp Drive Time Travel An Alcubierre Warp Drive stretches spacetime in a wave causing the fabric of space ahead of a spacecraft to contract and the space behind it to expand. The ship can ride the wave to accelerate to high speeds and time travel. The Alcubierre drive, also known as the Alcubierre metric or Warp Drive, is a mathematical model of a spacetime exhibiting features reminiscent of the fictional "warp drive" from Star Trek, which can travel "faster than light" (although not in a local sense - see below). The key characteristics of the application of Alcubierre warp drives for time control and time travel are presented in the picture below.

NASA Releases New High-Definition View of Iconic ‘Pillars of Creation’ Photo New view of the Pillars of Creation, visible light. NASA, ESA/Hubble and the Hubble Heritage Team. New view of the Pillars of Creation, visible light, detail. 125 Great Science Videos: From Astronomy to Physics & Psychology Astronomy & Space Travel A Brief, Wondrous Tour of Earth (From Outer Space) – Video – Recorded from August to October, 2011 at the International Space Station, this HD footage offers a brilliant tour of our planet and stunning views of the aurora borealis.A Universe from Nothing – Video – In 53 minutes, theoretical physicist Lawrence Krauss answers some big enchilada questions, including how the universe came from nothing.A Year of the Moon in 2.5 Minutes – Video – The Lunar Reconnaissance Orbiter has been orbiting the moon for over a year. The footage gets compressed into 2 slick minutes.A Day on Earth (as Seen From Space) – Video – Astronaut Don Pettit trained his camera on planet Earth, took a photo once every 15 seconds, and then created a brilliant time-lapse film.Atlantis’s Final Landing at Kennedy Space Center – Video – After more than 30 years, the space shuttle era comes to a close. Video runs 30 minutes.

Nanotech breakthrough: get ready for graphene The exciting one-atom thick super material can now be produced in ample quantities and high quality. Rapid improvements in nanotechnology are now expected. Technology improvements are about to get dramatically ultra-fast. Exciting sustaining and disruptive innovations are on the way for just about every digital appliance, from touchscreen tablet computing to solar cells, according to a Science Daily report. EWAO New Study suggests Alien Civilizations may number in TRILLIONS “We really do know that pretty much every star in the sky hosts at least one planet…” – astronomer Adam Frank. Rejoice Alien hunters, the possibility that Earth is not the only planet inhabited by an intelligent civilization has gained more credibility thanks to a brand new study that coincides with NASA’s recent planetary discoveries. The new study, published in the Journal Astrobiology proposes that more planets in our galaxy harbor advanced civilizations than anyone previously imagined. “We really do know that pretty much every star in the sky hosts at least one planet,” said astronomer Adam Frank co-author of the study.

Physical Reality of String Theory Demonstrated Posted on: Tuesday July 7, 2009. String theory has come under fire in recent years. Promises have been made that have not been lived up to. Leiden theoretical physicists have now for the first time used string theory to describe a physical phenomenon. Their discovery has been reported this week in 'Science'. As bright as a hundred million Suns: The clusters of monster stars that lit up the early universe The first stars in the Universe were born several hundred million years after the Big Bang, ending a period known as the cosmological 'dark ages' -- when atoms of hydrogen and helium had formed, but nothing shone in visible light. Now two Canadian researchers have calculated what these objects were like: they find that the first stars could have clustered together in phenomenally bright groups, with periods when they were as luminous as 100 million Suns. Alexander DeSouza and Shantanu Basu, both of the University of Western Ontario in Canada, publish their results in a paper in Monthly Notices of the Royal Astronomical Society. The two scientists modelled how the luminosity of the stars would have changed as they formed from the gravitational collapse of disks of gas. The early evolution turns out to be chaotic, with clumps of material forming and spiralling into the centre of the disks, creating bursts of luminosity a hundred times brighter than average.

Cosmos is a fantastic show about ideological conversion more than it’s about science Like Carl Sagan before him, Neil deGrasse Tyson is constructing a cult of personality. Also like Sagan, that personality is not his own. In both its versions, Cosmos has had to serve a number of masters — they’ve both had to educate, to entertain, and to bring in advertising. By far their most defining goal, however, the one that most differentiates them from both the Planet Earths and Bill Nyes of the world, is ideological. Cosmos was, and very thankfully still is, an unabashed attempt to exalt the scientist and to advance the scientific worldview in its entirety, with as few tactful omissions as possible.

Accelerating Future » 10 Interesting Futuristic Materials 1. Aerogel Aerogel holds 15 entries in the Guinness Book of Records, including "best insulator", and "lowest-density solid". Sometimes called "frozen smoke", aerogel is made by the supercritical drying of liquid gels of alumina, chromia, tin oxide, or carbon. It's 99.8% empty space, which makes it look semi-transparent. Earth's magnetic heartbeat - RiseEarth by With more than two years of measurements by ESA's Swarm satellite trio, changes in the strength of Earth's magnetic field are being mapped in detail. Launched at the end of 2013, Swarm is measuring and untangling the different magnetic signals from Earth's core, mantle, crust, oceans, ionosphere and magnetosphere - an undertaking that will take several years to complete. Although invisible, the magnetic field and electric currents in and around Earth generate complex forces that have immeasurable effects on our everyday lives. The field can be thought of as a huge bubble, protecting us from cosmic radiation and electrically charged atomic particles that bombard Earth in solar winds.

Interactive projector that turns any flat surface into a touch screen wins UK design award - Image 8 of 8 Light Touch transforms a projected image into a virtual 10-inch touch screen Image Gallery (8 images) Light Blue Opitcs (LBO) has won the Institution of Engineering and Technology (IET) Innovation Awards 2010 prize for Product Design with its Light Touch interactive projector. The device uses an infra-red touch sensing system that transforms a projected image into a virtual 10-inch touch screen. It allows users to interact with multimedia content and applications by touching the image, which can be projected onto any flat surface.

How To Identify That Light In The Sky? What is that light in the sky? Perhaps one of humanity’s more common questions, an answer may result from a few quick observations. For example — is it moving or blinking? If so, and if you live near a city,the answer is typically an airplane, since planes are so numerous and so few stars and satellites are bright enough to be seen over the din of artificial city lights. If not, and if you live far from a city, that bright light is likely a planet such as Venus or Mars – the former of which is constrained to appear near the horizon just before dawn or after dusk.Sometimes the low apparent motion of a distant airplane near the horizon makes it hard to tell from a bright planet, but even this can usually be discerned by the plane’s motion over a few minutes.