Are You Good or Evil? | Horizon
Horizon meets researchers studying psychopathic killers to try to determine what makes people good or evil. One such scientist believes he has found the 'moral molecule'.
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Selective breeding and the 'Green Revolution' | Botany: A Blooming History
Norman Borlaug used selective breeding techniques to improve wheat production in Mexico. He produced plants which had large seed heads and hence a good yield. However, the plants were too tall and were prone to falling over (lodging).
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Selective breeding | Countryfile
For thousands of years we have been selectively breeding farm animals to make them more and more productive. But in recent years there has been growing concern that pushing profitable traits has led to welfare problems.