This is CBS Eye on the World.

Here's John Batchler.

The search for dark matter.

The elephant in the universe is the new book by Govert Schilling.

100 years search for dark matter. Our story so far.

The universe doesn't hold together unless we can find something called dark matter.

Or unless dark matter doesn't exist, then we cannot explain how the universe holds together.

It's that puzzling.

So Govert has introduced us to the reasoning of what this particle might look like.

They call it a whim, weekly interacting massive particle.

Wim. However, the searches continue and we're going to go to one of those searches.

But before we go there, Govert surprises in his explication to introduce a chapter about a heretic.

The man's name is Milgram, and he and his colleagues are using Newtonian physics to explain what we observe in the heavens.

This is the part that I loved completely because this is not contrary.

This is what about and what I take is there are some cosmologists who accept the contraireness of it and some who are annoyed by it.

Is that correct, Govert?

Absolutely. This is an interesting story because Milgram and his colleagues, they came up with a brilliant idea because we still haven't found dark matter.

And we see it all around us. We see its effects in the motion of galaxies and clusters in the rotation of galaxies in the gravitational lensing.

But if you start to realize what's actually happening, the only thing we see is the gravitational effect of dark matter.

And to explain the gravitational effects that we see, we use our current theory of gravity, which is actually old Newtonian gravity and that's superseded by Einstein's generality.

Now Milgram asked himself, what if our ideas about gravity are wrong?

If we do not have the right theory of gravity, we might draw the wrong conclusions about what we're seeing.

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