Now here's a highlight from Coast to Coast AM on iHeartRadio.

And welcome back to Coast to Coast George Nori with you Marcus.

Chan with us as we will be talking about all things space.

What is it about the universe that excites you Marcus?

I suppose the most exciting thing for me at the moment is that we

can only see two and a half percent of it.

Okay, so we've now discovered incredibly our 350 years of soil

that the visible stuff, the stars and galaxies, the planets, you and me,

accounts for 5% of the universe, 5% of the mass of the universe.

And only half of that 5%, 2 and a half percent, we actually see with our telescopes.

The rest of it we think it might be invisible gas between the galaxies.

So only 5%.

And it turns out that there is about 25% is what we call dark matter.

We know it's out there because we can see it pulling on the visible stuff.

So we see all the visible stars and galaxies moving in waves we would not expect.

So we say there's stuff that's got gravity but we literally can't see it.

And about 70% is what we call dark energy.

And that was only discovered in 1998.

Can you believe it?

The major mass component of the universe, we didn't know about until 1998,

which is like 22 years ago.

And we've got really very little idea what dark energy and dark matter are.

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