We are no less human for being made of molecules.

This is one of the most common molecules on earth.

N is the total number of molecules in the system.

And it didn't have to be all the same kind of molecule.

The net movement of molecules would be toward the inside.

This can lead to a family of similar molecules being formed.

This works really well with a population of identical molecules.

The structure of molecules helps us understand how they work.

"The question is how does one kind of molecule play all these different roles?"

They wanted to see the process from birth to death of a molecule.