Floods drown Asia's rice bowl

Massive floods have ravaged vast swathes of Asia's rice bowl, threatening to further drive up food prices and adding to the burden of farmers who are among the region's poorest, experts say.

Photosensitive perovskites change shape when exposed to light

A crystalline material that changes shape in response to light could form the heart of novel light-activated devices. Perovskite crystals have received a lot of attention for their efficiency at converting sunlight into electricity, ...

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