What is the LK-99 superconductor? Everyone is talking about how it could change the world, but experts say we're still a long way off

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Magnetic lavitation
A magnet hovering above a superconductor. Persistent electric current flows on the surface of the superconductor, forming an electromagnet that repels the magnet.

J. Adam Fenster/University of Rochester

Cillian Murphy didn't just want to act like Oppenheimer. He asked science advisors to help him think like him, too.

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A side by side photo of J Robert Oppenheimer and Cillian Murphy, in costume in a promotional photo for the movie
J Robert Oppenheimer [left] smoking his signature pipe and the actor Cillian Murphy [right] who is playing him in Christopher Nolan's 'Oppenheimer'.

Getty Images [left], Universal Pictures [right]

How Christopher Nolan recreated the Trinity Test atomic bomb explosion in 'Oppenheimer' without any CGI

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trinity nuclear bomb test distant yellow mushroom cloud erupting into orange sky
A colorized photo of the mushroom cloud produced by the Trinity nuclear test as it rises over the New Mexico desert on July 16, 1945.

National Security Research Center

Inside the world's only high-energy collision antimatter factory where scientists create the most explosive substance in the universe to understand why we exist

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cern location
CERN is located on the France-Switzerland border.

YouTube/CERN

A physicist explains why there's no real end to a rainbow and the only way to spot a perfectly circular one in the sky

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A rainbow on the beach in Scotland.
Normally, Earth's horizon hides a rainbow's full circle.

Westend61 / Getty Images

A nuclear physicist describes 7 things you probably didn't know about radioactive fallout from a nuclear bomb

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Nuclear warhead
Nuclear warheads, like the one shown here, are short- and long-term killers.

gerasimov_foto_174/Shutterstock

The 2023 spring equinox is here — here's what it is and how it works

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nasa apollo 11 earth africa 1969 AS11 36 5352HR
Earth is a like 7,917-mile-wide rotisserie chicken.

NASA/Flickr

NASA videos reveal explosive events on the sun: a polar vortex of plasma, an X flare, and an eruption from the north pole

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video shows sun rotating ball of red plasma with a filament emerging from the top then breaking away and swirling around the north pole
A prominence emerges near the solar north pole, then appears to break away and swirl in a vortex.

NASA Solar Dynamics Observatory

Incoming Deep Freeze Could Leave U.S. Northeast Its Coldest in Decades

Gizmodo

The winter weather that left hundreds of thousands in Texas without power is moving north, and is set to bring wind chills as low as -50 degrees Fahrenheit (-45 Celsius) into New E

The Green Comet will be closest to earth on Feb 1. Here's the science behind its ghoulish glow.

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green comet streaking across starry night sky with long white tail
Comet ZTF, as photographed on January 18, 2023.

Dan Bartlett

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