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The Case for Putting Aside Dark Energy to Reevaluate General Relativity

A renewed suggestion that dark energy may not be real – dispensing with 70% of the stuff in the universe – has reignited a longstanding debate.<p>Dark …

Dark Matter

This Single Image Profoundly Sums Up Einstein's Landmark Theory

You might think you have gravity pretty well figured out. If you drop a ball out of a window, a short time later it will hit the ground. The higher …

Physics

What Did Ancient Romans Do Without Toilet Paper?

We’ve all been caught unawares by our digestive tract at one time or another.<p>It happened to the Nash family several months ago. We were nearing the …

Ancient Rome

Power of Light

Read a National Geographic magazine article about light and get information, facts, and more about photonics.<p>There has been light from the beginning. There will be light, feebly, at the end. In all its forms—visible and invisible—it saturates the universe. Light is more than a little bit …

Physics

A cosmic sense of scale

This animation gives a sense of the awe-inspiring scale of some of the known objects in our universe. It is difficult for human minds to comprehend …

Cosmology

Beyond the Surface of Einstein’s Relativity Lay a Chimerical Geometry

It was in 1905 that Albert Einstein unveiled his special theory of relativity, and in 1915, the general theory of relativity – both ingenious …

Physics

Water Behaves Differently From All Other Liquids, And We Finally Know Why

The Universe is so amazing.<p>You might not think about it much, but water is super weird. It doesn't behave like any other liquid. Now, by thinking …

Atoms

Momentum, Work and Energy

<i>Michael Fowler, U. Va. Physics.</i><p>Momentum<p>At this point, we introduce some further concepts that will prove useful in describing motion. The first of …

Physics

Quantum Gambling and the Nature of Reality — NOVA Next

<i>View the interactive version of this feature here.</i><p>In 1952, John Bell saw the impossible done. Bell was a young physicist working in the particle …

Quantum Mechanics

Einstein and the Quantum

He helped invent the concept, but struggled until his death with the idea of a probabilistic universe

Physics

Would Albert Einstein be a global warming skeptic? Yes

Associated Press fileThe famed physicist Albert Einstein once said, “In order to be a member of a flock of sheep, one must, above all, be a sheep …

Climate Change

Thermodynamics

<b>Thermodynamics</b> is a branch of physics which deals with the energy and work of a system. It was born in the 19th century as scientists were first …

Physics

We Still Don't Understand Why Time Only Flows Forward

Every moment that passes finds us traveling from the past to the present and into the future, with time always flowing in the same direction. At no point does it ever appear to either stand still or reverse; the “arrow of time” always points forwards for us. But if we look at the laws of physics — …

Physics

In A Quantum Universe, Even Mass Is Uncertain

In the microscopic world of the quantum particle, there are certain rules that are wholly unfamiliar to us on a macroscopic scale. If you measure a particle’s position and ask “where are you,” the more accurately you learn the answer, you’ll fundamentally know its motion, or its momentum, less …

Physics

Hummus isn't meant to be a dip

Maybe you’ve had this sandwich: A thick layer of garlicky chickpeas, smooshed to the consistency of mashed potatoes cemented cucumbers, sprouts, tomatoes and havarti cheese between two slices of wheaty, seedy bread, avocado optional. When I was in college in the 1990s it was my lunchtime go-to. The …

Food

Chaos Theory, The Butterfly Effect, And The Computer Glitch That Started It All

As Bob Dylan famously sang, “You don’t need a weatherman to know which way the wind blows.” Yet if you do have enough wind velocity information, combined with an array of readings from barometers, thermometers, and such, you might ask a weatherman, particularly a trained meteorologist with access …

Quantum Mechanics
World War II

The Revisionist History of the Gospel

Do you ever get the sense from any of the Gospel accounts of Jesus’s calling his disciples that he is looking for the cream of the crop?Does it …

Evangelical Christianity

Germany was once the witch-burning capital of the world. Here’s why

In 1572, the killings began. That year, authorities in the tiny settlement of St Maximin, in present-day Germany, charged a woman named Eva with using witchcraft to murder a child. Eva confessed under torture; she, along with two women she implicated, were burned at the stake.<p>The pace of …

Minkowski Spacetime and Lorentz Invariance: the cart and the horse or two sides of a single coin - Philsci-Archive

Acuña, Pablo (2016) <i>Minkowski Spacetime and Lorentz Invariance: the cart and the horse or two sides of a single coin.</i> Studies in History and …

The Three Meanings Of E=mc^2, Einstein's Most Famous Equation

For hundreds of years, there was an immutable law of physics that was never challenged: that in any reaction occurring in the Universe, mass was conserved. That no matter what you put in, what reacted, and what came out, the sum of what you began with and the sum of what you ended with would be …

Physics

12 Knots Everyone Should Master

<i>Last Updated December, 2017: We’ve updated the formatting on this post for clarity. Links have also been updated.</i><p>Our Go-To: Water Knot<p><b>Climbing</b> …

Climbing

How I became Christian again: my long journey to find faith once more

After experiencing the horrors of war, Bryan Mealer lost his faith. Morning runs with a priest – and a visit to a more welcoming church – helped restore it<p>A few mornings a week, I go running with a priest.<p>We meet at 5.30 under a streetlamp in central Austin and make our way down to the state …

Faith

What Is A Quantum Field, And How Does It Interact With Matter?

<i>What is a quantum field and how does it interact with matter? originally appeared on Quora:</i> <i>the place to gain and share knowledge, empowering people to learn from others and better understand the world</i>.<p><b>Answer by Viktor T. Toth, IT pro, part-time physicist, on Quora:</b><p>Quantum fields are the quantum …

Quantum Mechanics

The Weird Quantum Property of 'Spin'

<i>Paul Sutter is an astrophysicist at The Ohio State University and the chief scientist at COSI science center. Sutter is also host of Ask a Spaceman</i> …

This Extremely Common Drug Given to Alcoholics Also Kills Cancer Cells, and We Finally Know Why

Disulfiram (Antabuse) is a drug given to alcoholics to prevent them from drinking, but for decades doctors have noticed the medication appears to …

Introduction to the Book of Habakkuk

Come to Terms With Injustice in This Introduction to Habakkuk<p>The Old Testament book of Habakkuk, written 2,600 years ago, is yet another ancient …

Theology

How to digitize your handwritten notes

Make your scribbles searchable.<p>Computers and phones may be more ubiquitous than ever, but many people still prefer the traditional feeling of writing with ink on paper. After all, this method served us well for hundreds of years of human history. The problem is that you can't organize and search …

Apps

Fermion Definition in Physics

Why Fermions Are so Special<p>Fermion Definition<p>In particle physics, a <i>fermion</i> is a type of particle that obeys the rules of Fermi-Dirac statistics, …

EPR Paradox in Physics

How the EPR Paradox Describes Quantum Entanglement<p>The EPR Paradox (or the <i>Einstein-Podolsky-Rosen Paradox</i>) is a thought experiment intended to …

Quantum Mechanics