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South Africa’s coal fired power stations are breaching minimum emissions standards but shutting them down may jeopardise energy supply. Willem Cronje/Getty Images

South Africa’s new energy plan needs a mix of nuclear, gas, renewables and coal – expert

South Africa’s national electricity plan is being finalised. A scientist argues that an energy mix of nuclear, clean coal, renewable energy and gas is urgently needed to end 15 years of power cuts.
A Bothrops asper is prepared for its venom to be milked to use in making antivenom. Jon G. Fuller/VWPics/Universal Images Group

Snakebites: we thought we’d created a winning new antivenom but then it flopped. Why that turned out to be a good thing

By reporting this new way that future antivenoms can fail, the research has highlighted a problem with current antivenom testing recommendations.
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Why do we usually sleep at night? What happens when we don’t sleep? Expert insights into this essential part of our lives

Sleep is an essential part of life. What happens when we don’t get enough sleep and how do we ensure that we do?

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