Praveen Kumar

20 Flips | 4 Magazines | @pkinga475 | Keep up with Praveen Kumar on Flipboard, a place to see the stories, photos, and updates that matter to you. Flipboard creates a personalized magazine full of everything, from world news to life’s great moments. Download Flipboard for free and search for “Praveen Kumar”

Planck: Gravitational waves remain elusive

Despite earlier reports of a possible detection, a joint analysis of data from ESA's Planck satellite and the ground-based BICEP2 and Keck Array …

Gravitational Waves

A Wormhole Close to Home and 2 Other Astonishing Space Holes

It’s possible a wormhole exists in the middle of the Milky Way that could be large and stable enough for a spaceship to enter. “In theory, the Milky …

Universe

Physicists Have Built A Time Machine Simulator

YouTube/ABC<p>Suppose you traveled back in time and stopped your grandparents from ever meeting.<p>This would create a paradox since you never would have …

Evidence Of Expanding Universe May Have Been Just Dirt

Support for cosmic inflation just deflated a bit<p>It was a huge win for Big Bang supporters when, in March 2014, a team of astronomers claimed they had found direct evidence to support the concept of cosmic inflation—the super-rapid expansion of the Universe that occurred just fractions of a second …

10 scientific mysteries we are set to solve this century

In the 17th century, Isaac Newton solved the ancient controversy over the nature of forces and motion with his three laws. In the 18th, Ben Franklin figured out a lot about electricity. In the 19th, Darwin explained the diversity of species, Maxwell revealed the physics of light, Mendeleyev defined …

Physics

We All Might Be Living in an Infinite Hologram

Author: Seth Kadish. Seth Kadish Science<p>Date of Publication: 11.20.14.<p>Time of Publication: 6:00 am. 6:00 am<p><b>Quarks and leptons</b>, the building blocks of …

Exotic, giantic molecules fit inside each other like Russian nesting dolls

(<i>Nanowerk News</i>) University of Chicago scientists have experimentally observed for the first time a phenomenon in ultracold, three-atom molecules …

The Question That Could Unite Quantum Theory With General Relativity:

Is Spacetime Countable?<p>Current thinking about quantum gravity assumes that spacetime exists in countable lumps, like grains of sand. That can’t be …

The Paradoxes That Threaten To Tear Modern Cosmology Apart

Some simple observations about the universe seem to contradict basic physics. Solving these paradoxes could change the way we think about the …

Physicists Calculate Mass Of Top Quark, Heaviest Elementary Particle

In the first joint result from the world's two leading particle colliders, scientists have determined the mass of the heaviest elementary particle, the top quark.<p>The measurement was made using the Large Hadron Collider (LHC) at CERN in Geneva, Switzerland, and the Tevatron at Fermilab in Batavia, …

America's Contribution To A New Generation Of Physics

Stand in front of it and you are standing in the path of the most powerful beam of neutrinos in the world, which is emerging from a nearby particle accelerator at Fermilab, America's main particle-physics laboratory.<p>With any other kind of accelerator, standing in the beam would have spectacular and …

The End of Accelerator Physics?

In summer 2012, a dramatic news conference was held at the CERN laboratory in Geneva. There it was announced that two independent experiments at the lab's Large Hadron Collider (LHC) had confirmed the existence of the Higgs boson. This was a great triumph for the standard model of elementary …

Physics

Physicists Observe New Particle That's Also Its Own 'Antiparticle'

After decades of searching, physicists at Princeton University say they've observed an elusive particle that behaves both like matter and antimatter.<p>Yes, the discovery is an exciting step forward for particle physics, but it may also help advance the creation of powerful quantum computers.<p>In the …

Majorana particles - Fundamentally confusing

You could define particle physics as the quest to discover the fundamental constituents of nature, and to understand how they interact. The so-called “Standard Model” of physics contains a list of particles which are not made of anything else, and of which everything else is made.<p>The question of …

Sizing up a new particle accelerator, and the 'cosmic stupid' limit

Even if you assume you have the technology and the money to do it, how big should any successor to CERN’s Large Hadron Collider be? Physicists are trying to work it out<p>Somehow, you have to like a paper which contains the phrase<p>Now, let us assume that the effective cross section for the inelastic …

Fifty Years of Quarks... More Particles to Discover!

Fifty years ago, in 1964, physicists Murray Gell-Mann at Caltech and George Zweig at CERN came up with the idea of the quark as a response to the bewildering number of elementary particles that were being discovered at the huge "atom smasher" labs sprouting up all over the world. Basically, instead …

Physics

Warp Drive and 'Star Trek': Physics of Future Space Travel (Op-Ed)

<i>Marc G. Millis</i> <i>headed</i> <i>NASA's Breakthrough Propulsion Physics Project</i> <i>and took an early retirement to continue this work as part of the interstellar</i> …

Why wormholes (probably) don’t exist

The test rig for the Dark Energy Camera (DECam) at Fermilab. I picked this image today because it kinda sorta looks like the wormhole-making machine …

Wormholes

The Absurdity of Infinity: Astrophysicist Janna Levin Explains Whether the Universe Is Infinite or Finite in Letters to Her Mother

“The simpler the insight, the more profound the conclusion.”<p>In 1998, while on the cusp of becoming one of the most significant theoretical cosmologists of our time, mathematician-turned-astrophysicist <b>Janna Levin</b> left her post at Berkeley and moved across the Atlantic for a prestigious position at …

Alice In Wonderland