Mark Young

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Can We Change The Past?

Who has no regrets about things done in the past? Wouldn't it be nice if, somehow, we could go back to tweak a couple of bad decisions?<p>This sounds (and as we will see, <i>is,</i> to a certain extent) like science fiction.<p>The laws of physics prohibit traveling backwards in time for many reasons. If we did …

Quantum Mechanics

HyTech Power may have solved hydrogen, one of the hardest problems in clean energy - Vox

The “hydrogen economy” may be a thing after all.<p>It is an odd twist of chemistry that there is fuel embedded in the most common substance on earth: water.<p>Hydrogen — the H of H2O fame — turns out to be something of an all-purpose element, a Swiss Army knife for energy. It can be produced without …


Photons entangled to make new form of light

Photons, the elementary particles that make up light, are known to be fast, weightless and to not interact with each other. But in new experiments, …

Quantum Mechanics

Revisiting Asimov's Three Laws of Robotics

Humanoid robot prototypes, like these developed by Honda in the 1980s, were developed to help people with everyday tasks.<p>Morio/ Wikimedia Commons<p>The …

Artificial Intelligence

Physicists Just Found a New Way to Bend a Fundamental Rule of Light Waves

This is incredible.<p>One of the more well-known rules in physics is that light can only ever go one speed, so long as nothing stands in its way.<p>But new …