Citron Physics

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Why Trust A Theory? Physicists And Philosophers Debate The Scientific Method

This week, a group of about 100 physicists and philosophers have gathered in Munich to reassess a question at the heart of science: “Why trust a theory?” In an opinion piece by George Ellis and Joe Silk, published in Nature earlier this year, the two physicists expressed worry about current …

We visited the most powerful rocket ever built — and it was even better than we expected

To this day, the Saturn V — a ticket into the history books during the '60s and early '70s — remains the only rocket capable of transporting humans beyond low-Earth orbit, where the International Space Station resides. And it's a monster.<p>We recently visited the never used, ready-for-flight Saturn V …

Space Travel

A New Way of Thinking About Spacetime That Turns Everything Inside Out

<i>One of the weirdest aspects of quantum mechanics is entanglement, because two entangled particles affecting each other across vast distances seems to</i> …

Einstein's Theory of General Relativity

In 1905, Albert Einstein determined that the laws of physics are the same for all non-accelerating observers, and that the speed of light in a vacuum …

Albert Einstein

Viewpoint: Nuclear Spin Points out Arrow of Time

Author(s): Alexia AuffèvesEntropy production, a quantity associated with the emergence of the arrow of time, has been successfully measured in a …

Nuclear Energy

Ballistic Pendulums Are as Awesome as They Sound

Although it's not always so simple to set up, a ballistic pendulum is a perfect tool for introductory physics. The basic idea is to take something …

Physics

The best movies on HBO right now (June 2018)

True to its name, HBO has always aimed to bring the box office into people’s homes. That is easier than ever thanks to the network’s twin streaming …

From Time-Turner to TARDIS, How Time Travel Works in Science Fiction [Infographic]

Science fiction has proposed many methods for time travel over the years, and every work has its own rules. Now, we have a (by no means …

Astrophysicist says Bengals' game-winning FG aided by Earth's rotation

Mike Nugent's game-winning field goal for the Cincinnati Bengals in overtime hit the left upright before bouncing in. Nugent can thank the Earth's …

NASA uses the Sun and Moon to photograph shockwave structures

High speed photography techniques have the ability to capture some pretty incredible stuff. We've seen "compressed ultrafast photography" used to track light before and NASA is showing off new pictures of shockwaves taken using the "schlieren technique." To capture images like the one above, …

The Multiverse Of Perception

<i>Today, we at 13.7 are honored to host as a guest blogger Nobel Laureate Frank Wilczek, one of the world's leading theoretical physicists. Wilczek won the Nobel Prize for his contributions to our understanding of how quarks behave inside particles called hadrons, of which protons and neutrons are</i> …

The Physics of How That Star Wars BB-8 Toy Works

Author: Rhett Allain. Rhett Allain Science<p>Date of Publication: 09.04.15.<p>Time of Publication: 2:21 pm. 2:21 pm<p>When I was kid, I had Star Wars toys—but …

Some guy used physics to guess how much Yoda weighs (and the answer might surprise you)

en_US<p>article<p>While everyone knows Luke Skywalker travels to Dagobah to train with Jedi master Yoda, not everyone knows just how hard it was for him to …