Articles on Nucleus

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The Rutherford Atomic Model of a neon atom, showing the atom as similar to a solar system, with electrons orbiting a nucleus. Encyclopaedia Britannica/UIG Via Getty Images

Curious Kids: What is the smallest thing in the universe?

The electron is the tiniest particle. Then there are neutrinos, which are as small but may weigh more.
Protons and neutrons in an atom’s nucleus can be arranged in different configurations, creating nuclear isomers. KTSdesign/SciencePhotoLibrary via Getty Images

Nuclear isomers were discovered 100 years ago, and physicists are still unraveling their mysteries

Nuclear isomers are rare versions of elements with properties that mystified physicists when first discovered. Isomers are now used in medicine and astronomy, and researchers are set to discover thousands more of them.
Messenger RNA carries the instructions for life from DNA to the rest of the cell. ktsimage/iStock via Getty Images Plus

What is mRNA? The messenger molecule that’s been in every living cell for billions of years is the key ingredient in some COVID‑19 vaccines

In the spotlight for its role in COVID-19 vaccines – and a Nobel Prize – mRNA is not a new invention. It’s a crucial messenger molecule at work every day in every cell in your body.

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