Modern cosmology often presents itself as the most triumphant extension of physics: a discipline that has traced the history of the universe from fractions of a second after the Big Bang to the ...

The word “ atom ” is from the Greek word atomos, which means “uncuttable”. This is the smallest particle in the universe that behaves “normally”. Normal behaviour for a particular atom means that it ...

All the “normal” matter, like the stars, gas, dust, and people, is called baryonic matter, and it’s basically the tiny visible fraction of a universe that’s mostly invisible and still not fully ...

Atoms are far too small to be seen directly, yet scientists still talk about their “color.” In physics, color refers to the specific wavelengths of light an atom absorbs or emits when its electrons ...

They show up as a mathematical solution in general relativity, basically as a time-reversed version of a black hole. Some ...