Neutrino experiments find no sign of expected new subatomic particle

An extensive search for a hypothetical particle has turned up empty. The sterile neutrino is a proposed subatomic particle that could even be a candidate for the mysterious dark matter, and although previous studies have hinted at its existence, two ne… Continue reading Neutrino experiments find no sign of expected new subatomic particle

Spacetime wave packets: New class of laser defies laws of light physics

Scientists have created a new class of laser beam that appears to violate long-held laws of light physics. These new beams, which the team calls “spacetime wave packets,” follow different rules of refraction, which could lead to new communication techn… Continue reading Spacetime wave packets: New class of laser defies laws of light physics

How old is the universe? New studies disagree by a billion years

The universe likes to play coy about its age, but astronomers believe they have a pretty good idea of the range. Now, a series of new studies has investigated the question using different methods – and they’ve come up with two different answers, separa… Continue reading How old is the universe? New studies disagree by a billion years

Quantum time travel doesn’t follow Back to the Future rules

Time travel movies have different rules about what happens when you start messing around with the timeline. If you’ve ever wondered which ones make the most sense, we may now have an answer. According to experiments using a quantum time travel simulato… Continue reading Quantum time travel doesn’t follow Back to the Future rules

Strange metals: New state of matter shares properties with black holes

“Strange metals” have that name for a reason – these materials exhibit some unusual conductive properties and surprisingly, even have things in common with black holes. Now, a new study has characterized them in more detail, and found that strange meta… Continue reading Strange metals: New state of matter shares properties with black holes

Second-generation of powerful X-ray laser fires for the first time

Scientists have achieved first light with an upgrade to one of the most powerful X-ray lasers the world has ever seen. The Linac Coherent Light Source (LCLS) images individual atoms and molecules by blasting them with intense X-ray bursts, and now its … Continue reading Second-generation of powerful X-ray laser fires for the first time

World’s lightest mirror is made from a few hundred atoms

Using just a few hundred identical atoms, physicists at the Max Planck Institute of Quantum Optics have pieced together the world’s lightest mirror. Despite having a surface measured in mere microns and being invisible to the naked eye, the one-of-a-ki… Continue reading World’s lightest mirror is made from a few hundred atoms

Dark matter: What is it, how do we know it’s there and will we find it?

It sounds like science fiction to say there’s invisible, undetectable stuff all around us, and it doesn’t help that it has the spooky name of dark matter. But there’s plenty of evidence that this material is very real. So what exactly is dark matter? H… Continue reading Dark matter: What is it, how do we know it’s there and will we find it?

“Supernova machine” recreates cosmic blasts in the lab

Supernovae are some of the most energetic events in the universe, and the resulting nebulas are a favorite for stargazers. To better understand the physics behind them, researchers at Georgia Tech have created a “supernova machine” in the lab.Continue … Continue reading “Supernova machine” recreates cosmic blasts in the lab