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The roots of invention © dhritipurna/Shutterstock
Living root bridges like this can be found in the tropical rainforests of Meghalaya, a state in northeast India that is among the wettest places on Earth. The gentle waterways that flow through the region’s valleys become gushing torrents during the summer monsoon season and will wash away traditional bamboo bridges. So, generations of indigenous Khasi people have devised a way of building root bridges by shaping living trees, like this one near the village of Mawsynram.