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Time Travel Is Possible But Only To The Future, English Physicist Says

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We may be able to book our ticket to the future someday — it’ll just be a one-way trip.

In a presentation at the British Science Festival, particle physicist Brian Cox said that time travel is possible but only in one direction.

“The central question is, can you build a time machine? The answer is yes, you can go into the future,” the University of Manchester professor told the audience during his hour-long speech on Tuesday, according to The Telegraph. “You’ve got almost total freedom of movement in the future.”

Cox detailed how time travel to the future is possible under Albert Einstein’s general theory of relativity. Traveling hundreds, or even thousands of years into the future, could be accomplished if someone was traveling at an incredibly fast pace, close to the speed of light.

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time travel possible

Particle physicist Brian Cox speaking in Hay-on-Wye, Wales on May 28, 2011. (Photo by David Levenson/Getty Images)
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Lycurgus Cup, Ancient Roman Artifact, Inspires Modern-Day Nanotechnology (VIDEO)

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The ancient Romans were pretty advanced for their time — so advanced that they may even have been pioneers of what we now call nanotechnology.

In fact, an ornately decorated Roman artifact, known as the Lycurgus cup, is inspiring researchers to explore practical applications of the ancient technology.

Created sometime in the Fourth Century, the goblet exhibits a color-changing property that makes its glass take on different hues, depending on the light source — just watch the cup in the video above.

Scientists were long at a loss to explain the cup’s color changes. Then in the 1990s they discovered tiny particles of silver and gold in the cup’s glass. According to Smithsonian Magazine, “When hit with light, electrons belonging to the metal flecks vibrate in ways that alter the color depending on the observer’s position.”

Now, a research team is attempting to build upon the unique technology and apply it in the medical field.

Gang Logan Liu, an University of Illinois assistant professor who has studied the Lycurgus cup for several years, described it as an “icon for inspiration.”

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Usain Bolt’s Speed Comes Despite Serious Aerodynamic Drag, Physicists Say (VIDEO)

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What explains Usain Bolt’s speed? Track fans have been debating that question for years, and now a team of physicists from the National University of Mexico in Mexico City have created a mathematical model that helps explain how the world’s fastest man is able to bolt 100 meters in well under 9.6 seconds.

“As far as our study can reveal, he seems to be able to develop more power than other runners,” study co-author Dr. Jorge Hernandez, a professor of biophysics at the university, told The Huffington Post in an email. “A way of doing it is that he finds a way to reduce the area (cross section, as we call it) he presents to the air. Maybe adopting a running position that reduces this area, but that wouldn’t reduce his performance/ability to deploy the power he actually does.”

The researchers analyzed Bolt’s 100-meter sprint in the 2009 World Championships in Berlin, where he set a new world record at 9.58 seconds. Considering Bolt’s height (he stands six-foot, five inches), race-day conditions, and the speed he reached, the scientists calculated the amount of drag that Bolt had to overcome to set that record.

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usain bolt speed

Jamaica’s Usain Bolt wins the men’s 100m final race of the 2009 IAAF Athletics World Championships on August 16, 2009 in Berlin, setting a new world record of 9.58 seconds.
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‘Schrodinger’s Cat’ Thought Experiment Put To Test By Physicists In Canada, Switzerland

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The strangeness of the world of the very small that allows a particle to be in two states at once may extend to larger scales, two new studies reveal. If the research proves true, that would bolster the validity of a thought experiment suggesting a cat can be both alive and dead at the same time.

The idea, called Schrödinger’s Cat after the physicist,Erwin Schrödinger, who proposed it in 1935, goes like this: Put a cat in a box with a vial of poison gas. The vial opens when a tiny piece of radioactive metal emits an alpha particle (the nucleus of a helium atom) as it decays. Emitting an alpha particle is a quantum-mechanical process, which means that whether it happens in any given stretch of time is basically random.

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schrodinger's cat

Erwin Schrödinger, Austrian physicist. New research bolsters the validity of his thought experiment suggesting a cat can be both alive and dead at the same time.

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http://www.huffingtonpost.com/2013/07/23/schrodingers-cat-thought-experiment-physicists_n_3639077.html?ref=topbar

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CERN Scientists Observe Rare Particle Decay That Helps Confirm Theory About Universe’s Birth

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After a quarter-century of searching, scientists have nailed down how one particularly rare subatomic particle decays into something else – a discovery that adds certainty to our thinking about how the universe began and keeps running.

The world’s top particle physics lab said Friday it had measured the decay time of a particle known as a Bs (B sub s) meson into two other fundamental particles called muons, which are much heavier than but similar to electrons. It was observed as part of the reams of data coming from CERN’s $10 billion Large Hadron Collider, the world’s largest atom smasher, on the Swiss-French border near Geneva.

The rare sighting at the European Center for Nuclear Research, known by its French acronym CERN, shows that the so-called standard model of particle physics is “coming through with flying colors,” though it describes only 5 percent of the universe, said Pierluigi Campana, who leads one of the two main teams at CERN involved in the research.

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cern particle

Large Hadron Collider at CERN where physicists conducted particle decay experiment.

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http://www.huffingtonpost.com/2013/07/19/cern-scientists-rare-particle-decay-theory-universe-birth_n_3622595.html?ref=topbar

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‘Time Cloak’ Makes Information Vanish By Creating Gaps In Time, Scientists Say

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A new invisibility cloak for data can make information vanish by creating holes in time, new research suggests.

The researchers, who describe their work today (June 5) in the journal Nature, found that by tweaking the optical signals in telecommunications fibers, they created a way to essentially mask data sent between a sender and a receiver to outside observers. This isn’t the first time researchers have taken a page from Harry Potter: Last year, scientists also demonstrated a similar invisibility cloak.

But the new “time cloak” can create many time holes in rapid succession, which means masked data could be sent at commercial data speeds, said Martin McCall, a theoretical-optics researcher at Imperial College London who was not involved in the study. 

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Time Cloak

Scientists demonstrate how they have have created, a new invisibility technique that doesn’t just cloak an object (like in Harry Potter books and movies), but masks an entire event. It is a time masker that works by briefly bending the speed of light around an event.

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http://www.huffingtonpost.com/2013/06/06/time-cloak-invisibility-information-gaps-time_n_3395737.html?ref=topbar

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Warp Drive Feasible? Relativity Loophole Means ‘Star Trek’ Device Might Actually Work, Physicists Say

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In the “Star Trek” TV shows and films, the U.S.S. Enterprise’s warp engine allows the ship to move faster than light, an ability that is, as Spock would say, “highly illogical.”

However, there’s a loophole in Einstein’s general theory of relativity that could allow a ship to traverse vast distances in less time than it would take light. The trick? It’s not the starship that’s moving — it’s the space around it.

In fact, scientists at NASA are right now working on the first practical field test toward proving the possibility of warp drives and faster-than-light travel. Maybe the warp drive on “Star Trek” is possible after all. [See also: Warp Drive: Can It Be Done? (Video)]

According to Einstein’s theory, an object with mass cannot go as fast or faster than the speed of light. The original “Star Trek” series ignored this “universal speed limit” in favor of a ship that could zip around the galaxy in a matter of days instead of decades. They tried to explain the ship’s faster-than-light capabilities by powering the warp engine with a “matter-antimatter” engine. Antimatter was a popular field of study in the 1960s, when creator Gene Roddenberry was first writing the series. When matter and antimatter collide, their mass is converted to kinetic energy in keeping with Einstein’s mass-energy equivalence formula, E=mc2.

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Warp Drive

In the “Star Trek” TV shows and films, the U.S.S. Enterprise’s warp engine allows the ship to move faster than light, an ability that is, as Spock would say, “highly illogical.” However, there’s a loophole in Einstein’s general theory of relativity that could allow a ship to traverse vast distances in less time than it would take light.

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.Click link below for story, slideshow, and video:

http://www.huffingtonpost.com/2013/05/14/warp-drive-possible-star-trek-special-relativity_n_3273422.html?ref=topbar

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Antimatter-Gravity ‘Alpha’ Experiment At CERN Tests Force’s Effect, Yields Ambiguous Result

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When it comes to antimatter, what goes up doesn’t necessarily come down. In a new study, physicists weighed antimatter in an effort to determine how this strange cousin of matter interacts with gravity.

Ordinary matter atoms fall down due to the pull of gravity, but the same might not be true of antimatter, which has the same mass as matter, but opposite charge and spin. Scientists wondered whether antimatter atoms would instead fall up when pulled by gravity, and whether such a thing as antigravity exists.

“In the unlikely event that antimatter falls upward, we’d have to fundamentally revise our view of physics and rethink how the universe works,” Joel Fajans, a physicist at the Lawrence Berkeley National Laboratory in California, said in a statement.

Fajans and his colleagues at the Alpha experiment at Switzerland’s CERN physics lab made the first experimental measurements of the gravitational mass of antihydrogen — the antimatter equivalent of hydrogen, made of an antiproton and a positron (the antimatter counterpart to an electron). [Whoa! The Coolest Little Particles in Nature]

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Antimatter

This illustration of antimatter shows antiparticle beside its particle mirror-image.

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http://www.huffingtonpost.com/2013/04/30/antimatter-gravity-alpha-experiment-cern-force-atoms_n_3187289.html?ref=topbar

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Gravity Waves, Predicted By Einstein’s General Relativity Theory, May Soon Be Detected

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In the next five years or so, scientists are poised to discover proof that space and time can wrinkle in the form of gravitational waves. These waves were predicted almost 100 years ago by Albert Einstein’s general theory of relativity, but have yet to be seen.

That could change soon when the latest, most sensitive experiments hunting gravitational waves come online. “There’s so much activity and excitement in the field right now,” said Mansi M. Kasliwal, an astronomer at the Observatories of the Carnegie Institution for Science in Pasadena, Calif. “The momentum is really building.”

Kasliwal is the author of a paper published online today (May 2) in the journal Science describing the burgeoning field of gravitational wave studies.

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Gravity Waves

3D visualization of gravitational waves produced by two orbiting black holes.

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http://www.huffingtonpost.com/2013/05/03/gravity-waves-found-einstein-general-relativity-theory_n_3203364.html?ref=topbar

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Dark Matter Found? Underground Detector Finds Hints Of Elusive Particle, Physicists Say

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Hints of dark matter, the mysterious stuff that makes up perhaps 85 percent of the matter in the universe, may have been observed by scientists.

But researchers are far from saying they’ve discovered the source of dark matter.

“We’re not claiming anything,” warned Blas Cabrera, a Stanford University physicist speaking here today (April 15) at a meeting of the American Physical Society. [Explaining Dark Matter (Infographic)]

The new results come from the Super Cryogenic Dark Matter Search (SuperCDMS), which takes place deep underground in the Soudan mine in northern Minnesota.

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Dark Matter Found

The Cryogenic Dark Matter Search experiment (SuperCDMS) uses five towers of dark matter detectors like the ones shown here.

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.Click link below for story and slideshow:

http://www.huffingtonpost.com/2013/04/15/dark-matter-found-underground-detector-particle-physicists_n_3086829.html?ref=topbar

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