World
Photos: Gaza before and after – a city transformed by war
Archive and recent photos show how three years of war left Gaza's streets, landmarks and public spaces unrecognisable.
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Science
Corals as climate archive: Are El Nino events intensifying?
Records show that El Nino events have been frequent and often extreme over the past few decades. Is this normal? Or is it the result of climate change? Corals can give us a clear indication.