This is what we depend upon to be alive here in the world. I'm John Bachelor.

Oxygen. Oxygen is what we depend upon to be alive here in the 21st century.

Once upon a time, planet Earth had very limited oxygen, maybe even none. The period of time from minimal oxygen, or none, to the present day

is vital to understand because that's where life came from, life as we understand.

This is Hotel Mars episode N.

I'm John Batster.

With me is David Livingston, Dr Space, my colleague and co-host, and we're very thrilled to welcome Yuri Reeb.

Yuri is the Freddie and Nadine Herman Institute of Earth Sciences at the Hebrew University

in Jerusalem.

And with his colleagues, he has published an article,

Late Paleozoic oxygenation of marine environments supported by

Dalomite U-Hibb-Dating.

Mikhail Ben Israel is a co-author along with Robert Holder,

Lyle Nelson, Emily Smith, Andrew Kylander Clark.

However, Yuri, your title is impressive and overwhelming.

So we need to do some definitions.

This is the oxygenation of the oceans and the atmosphere that took place at least maybe less than half a billion years ago.

Marine environments that were concentrating on the oceans.

We need to know how you did this, you're dating things. What is

dolomite UPP dating? How does that help us understand when the Earth went from

limited oxygen to the oxygen of today.

Good evening to you.

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