Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected]. How do atoms form? – Joshua, age 7, Shoreview, ...

Protons are tiny particles just a femtometer across, but without them, atoms wouldn't exist. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Physicists have long-suspected that the building blocks of protons experienced quantum entanglement. Now, researchers have the first direct evidence — after using a trick to infer subatomic particles' ...