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Articles on Albert Einstein

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When two particles are entangled, the state of one is tied to the state of the other. Victor de Schwanberg/Science Photo Library via Getty Images

What is quantum entanglement? A physicist explains the science of Einstein’s ‘spooky action at a distance’

A multitude of experiments have shown the mysterious phenomena of quantum mechanics to be how the universe functions. The scientists behind these experiments won the 2022 Nobel Prize in physics.
Rosa Luxemburg, the Polish-born German revolutionary and co-founder of the German Communist Party, addressing a meeting in Stuttgart, Germany, in 1907. She was assassinated in January 1919. Universal History Archive/Getty Images

Russia’s antisemitism aimed at Ukraine’s Zelenskyy is just the Kremlin variant of a very old European virus

Antisemitism has been used as a weapon against leading Jewish politicians in Europe for over a century – no matter how assimilated they were. Ukraine’s Volodymyr Zelenskyy is no exception.
An artist’s impression of the Double Pulsar system in which the two pulsars orbit each other every 2.5 hours and send out high-energy beams that sweep across the sky. Image credit: John Rowe Animations/CSIRO

We counted 20 billion ticks of an extreme galactic clock to give Einstein’s theory of gravity its toughest test yet

Astronomers watched a pair of pulsars for 16 years to test the theory of general relativity, which has stood unchallenged for over a century.
Gravity feels like it’s pulling everything toward Earth, but why? AdventurePhoto/E+ via WikimediaCommons

Why does gravity pull us down and not up?

Gravity is something every person on Earth intuitively understands: It is what keeps you on the ground. But how come gravity pulls down, rather than pushes up? Einstein came up with the answer.
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Curious Kids: is light a wave or a particle?

Einstein was awarded a Nobel prize for his explanation for how light can be described as being made up of individual particles of energy under certain conditions.

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