Level 30 Biology

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Trying to Save the World's Amphibians

All over the world frogs and hundreds of other amphibians are rapidly disappearing. The situation is so serious that some scientists believe we are witnessing the biggest mass extinction since the dinosaurs.

Living Forever: The Longevity Revolution

Scientists from around the world are racing to answer the question: Can we turn back the human clock? Gerontologist Michael Rose leads us through cutting-edge science in life extension: biotechnology, genetic research, therapeutic cloning and stem-cell research. Living Forever looks at what could...

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