![Disco lights and dark arts - meet South Africa's 'scientist of rugby'](https://cdn.newsserve.net/en/knowledge/South-Africa_20190127.jpg)
Disco lights and dark arts - meet South Africa's 'scientist of rugby'
From video games to uniting a nation, Rassie Erasmus constantly finds new ways to drill and motivate a South Africa team targeting back-to-back Rugby World Cup triumphs.
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