How is matter different from mass? These and other questions about the deepest levels of physics, answered inside.

The majority of our evidence for dark matter’s existence comes from observing visible (or baryonic) matter that does not ...

Neutrinos are ghostly subatomic particles that can travel in a straight line for billions of light-years, passing unhindered ...

These two properties of axions mean that they are exceptionally good at collapsing down to incredibly high densities, pulled ...

Perhaps one of the most surprising discoveries of the 20th century was that this ordinary, or baryonic, matter makes up less than 5 percent of the mass of the universe. The rest of the universe ...

There are three main states of matter: solid, liquid and gas ... multiply the specific heat capacity of the substance, the mass and required temperature change. Potential energy is due to the ...

This dark matter makes up most of the mass in the universe, far outweighing the amount of luminous matter. The identity of dark matter remains a mystery, as experiments designed to detect a stray ...

Mass balance ensures that the carbon formerly ... individual elements can vary a great deal between nonliving and living matter (Figure 5). Life on Earth depends on the recycling of essential ...