Why did they form at that time? Astronomers know from observing distant exploding stars that the size of the universe has ...

Atoms, those tiny constituents of matter, are invisible to the naked eye, but their interactions shape our reality. However, the notion of "contact" between them is much more complex than it seems.

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 CuriousKidsUS@theconversation.com. Richard Feynman, a famous theoretical physicist ...

What color is an atom? Since atoms are smaller than the wavelength of visible light, we can’t see them directly - but they ...

Everything is made of atoms. Including us! These fundamental building blocks of matter formed at different times. Hydrogen first appeared around 14 billion years ago, heavier elements came later. This ...