Level 30 Biology
Videos are listed chronologically by date added, beginning with the most recent
Trying to Save the World's Amphibians
Series: News in Review: November 2009
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
Series: Nature of Things
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...
Mechanisms of Evolution
This video looks at evolution - the gradual change that can be seen in a population's genetic composition - from one generation to the next. The three main mechanisms of evolution, genetic drift, mutation and natural selection are discussed. Counters are used to model the process.