<p>Paul Ehrlich has released a memoir. It covers his decades of science and activism. There have been some improvements. But mostly his concerns are even stronger.</p>

Paul Ehrlich has released a memoir. It covers his decades of science and activism. There have been some improvements. But mostly his concerns are even stronger.

Paul Ehrlich  - memoir traces science, activism and concerns for the planet

The Science Show gives Australians unique insights into the latest scientific research and debate, from the physics of cricket to prime ministerial biorhythms.

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Natural Sciences

The Science Show gives Australians unique insights into the latest scientific research and debate, from the physics of cricket to prime ministerial biorhythms.

The Science Show&nbsp;gives Australians unique insights into the latest scientific research and debate, from the physics of cricket to prime ministerial biorhythms.

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Paul Ehrlich - memoir traces science, activism and concerns for the planet

Paul Ehrlich - memoir traces science, activism and concerns for the planet