Jonathan Orten O'Brien

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This Is How Stressed Elon Musk Is About Artificial Intelligence

He's majorly concerned.<p>Elon Musk, the tech billionaire who wants to colonize Mars, is seriously worried about advances in artificial …

Cosmologists create largest simulation of galaxy formation, break their own record: A multi-institutional team gives the cosmology community a world-class simulation to study how the universe formed.

A multi-institutional team gives the cosmology community a world-class simulation to study how the universe formed.<p>Cosmology researchers are …

Universe

Ejection of rocky and icy material from binary star systems: Implications for the origin and composition of 1I/‘Oumuamua | Monthly Notices of the Royal Astronomical Society: Letters

In single star systems like our own Solar system, comets dominate the mass budget of bodies that are ejected into interstellar space, since they form …

Astronomy

A Visiting Star Jostled Our Solar System 70,000 Years Ago

Around the same time our ancestors left Africa, a dim red dwarf star came to within 0.8 light-years of our Sun, marking the closest known flyby of a …

Where the Solar system meets the solar neighbourhood: patterns in the distribution of radiants of observed hyperbolic minor bodies | Monthly Notices of the Royal Astronomical Society: Letters

Observed hyperbolic minor bodies might have an interstellar origin, but they can be natives of the Solar system as well. Fly-bys with the known …

Universe

Nathan Rosen - Wormholes and Time Travel

Artist impression of a Schwarzschild wormhole<p>On March 22, 1909, US-American physicist <b>Nathan Rosen</b> was born. He is best known for his cooperation …

Quantum Mechanics

The Puzzle Of Quantum Reality

There’s a hole at the heart of quantum physics.It’s a deep hole. Yet it’s not a hole that prevents the theory from working. Quantum physics is, by …

Quantum Mechanics

How the 'Many Worlds' Interpretation Was Born

Over several rounds of sherry late one night in the fall of 1955, the Danish physicist Aage Petersen debated the mysteries at the heart of quantum …

Princeton University

Interbreeding Surprise! More Denisovans in Our Family Tree

Hey, sex happens. And apparently, whenever our ancestors met up with other members of the genus Homo, it happened a lot. New genetic analysis …

University of Washington

Synchronized Galactic Orbit Challenges Our Best Theory of How the Universe Works

Scientists thought the Milky Way and Andromeda galaxies were unique: They’ve got rings of smaller dwarf galaxies orbiting in what seems to be a …

Dark Matter

NASA's Deep Space Network: How Spacecraft Phone Home

Long-distance phone calls have nothing on NASA's Deep Space Network. Three stations scattered around the world make it possible to communicate with …

Gravity doesn’t leak into large, hidden dimensions

Gravitational waves from a recently observed neutron star merger offer no evidence of large, unknown dimensions.

Generalized Hardy's paradox shows an even stronger conflict between quantum and classical physics

In 1993, physicist Lucien Hardy proposed an experiment showing that there is a small probability (around 6-9%) of observing a particle and its …

Quantum Mechanics

Will future landers on Europa sink?

Jupiter’s moon Europa is an ocean world beneath an icy crust, and scientists want to land a spacecraft there. But a new study indicates a surface …

Missing Neutrons May Lead a Secret Life as Dark Matter

Neutrons shouldn’t be all that mysterious. Found inside every atomic nucleus, they may seem downright mundane—but they have long confounded …

Physics

Cassini uncovers a “sea level” on Titan, similar to Earth

Data collected before the mission’s end reveals ever more similarities between Earth and Saturn’s largest moon.

Astronomy

Potential New Particle Shows Up at the LHC, Thrilling and Confounding Physicists

A little wiggle on a graph, representing just a handful of particles, has set the world of physics abuzz. Scientists at the Large Hadron Collider …

Physics

What's the Ideal Number of Humans on Earth?

Earth might be looking a little worse for wear, after the last four-hundred years of reckless wide-scale resource extraction, but to its credit it …

Population

$180bn investment in plastic factories feeds global packaging binge

The global plastic binge which is already causing widespread damage to oceans, habitats and food chains, is set to increase dramatically over the next 10 years after multibillion dollar investments in a new generation of plastics plants in the US.<p>Fossil fuel companies are among those who have …

Pollution

Plastic pollution risks 'near permanent contamination of natural environment'

First global analysis of all mass–produced plastics has found humans have produced 8.3bn tonnes since the 1950s with the majority ending up in landfill or oceans<p>Humans have produced 8.3bn tonnes of plastic since the 1950s with the majority ending up in landfill or polluting the world’s continents …

Pollution

Sea salt around the world is contaminated by plastic, studies show

Exclusive: New studies find microplastics in salt from the US, Europe and China, adding to evidence that plastic pollution is pervasive in the environment<p>We are living on a plastic planet. What does that mean for our health?<p>Sea salt around the world has been contaminated by plastic pollution, …

Pollution

Sleeping boosts women's brain power but men benefit more from naps, research suggests

Getting a good night’s sleep boosts women’s brain power, while men benefit from shorter naps, research has suggested.<p>Scientists at the Max Planck …

Spindle activity phase-locked to sleep slow oscillations

Abstract<p>The < 1 Hz slow oscillation (SO) and spindles are hallmarks of mammalian non-rapid eye movement and slow wave sleep. Spindle activity …

Sleep spindle

For other uses, see Spindle (disambiguation).<p>Sleep spindles are bursts of neural oscillatory activity that are generated by interplay of the thalamic …

What you can learn from Einstein’s quirky habits

More than 10 hours of sleep and no socks – could this be the secret to thinking like a genius?<p>Celebrated inventor and physicist Nikola Tesla swore by toe exercises – every night, he’d repeatedly ‘squish’ his toes, 100 times for each foot, according to the author Marc J Seifer. While it’s not …

Princeton University

Ancient fossil microorganisms indicate that life in the universe is common: Scientists analyze specimens from 3.465 billion years ago

Scientists analyze specimens from 3.465 billion years ago<p>A new analysis of the oldest known fossil microorganisms provides strong evidence to support …

NASA is planning an interstellar mission for 2069, may head to nearby Alpha Centauri

Mankind hasn’t yet explored some of the most interesting objects in our own solar system — heck, we still don’t even know all that much about Earth …

How fast is dark matter?

<b>Title:</b> Empirical Determination of Dark Matter Velocities using Metal-Poor Stars<b>Authors:</b> Jonah Herzog-Arbeitman, Mariangela Lisanti, Piero Madau, Lina …

Dark Matter

Doing without dark energy: Mathematicians propose alternative explanation for cosmic acceleration

Three mathematicians have a different explanation for the accelerating expansion of the universe that does without theories of "dark energy." …

Dark Matter

Star mergers: A new test of gravity, dark energy theories: Observations of neutron star collision challenge some existing theories

Observations of neutron star collision challenge some existing theories<p>Observations and measurements of a neutron star merger have largely ruled out …