[Physics] Physics Digest, Vol 19, Issue 5

[Ilja Schmelzer]

> I have a related question for you. Since the universe is expanding,
> that means that all matter is growing larger. Since the tools that we
> use are also getting larger, how would we notice?

No, what is held together by forces (including the gravitational
force) remains of the same size.

So, the size of everything on Earth, but also the Solar system, the
galaxies, and even the galaxy clusters remains unchanged in size.

> Is this why fossils
> from millions of years ago seem larger than today?

Certainly not.