In one video, you can see a hungry caterpillar, first working around a leaf’s edges, approaching the base of the leaf and, with one last bite, severing it from the rest of the plant. Within seconds, a blaze of fluorescent light washes over the other leaves, a signal that they should prepare for future attacks by the caterpillar or its kin.

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On March 11, 2011, a one-two, earthquake-tsunami punch knocked out the safety systems at the Fukushima Dai-ichi nuclear power plant, triggering an explosion of hydrogen gas and meltdowns in three of its six reactors—the world’s worst nuclear disaster since Chernobyl. Fukushima’s facility was built with 1960s technology, designed at a time when engineers underestimated plant vulnerabilities during natural disasters. In the US, 20 plants with similar designs are currently operating.

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While walking or driving along tree-lined streets in São Paulo, Brazil’s largest city, you will pass many a tipuana tree (Tipuana tipu). Also known as rosewood or tipu, it is a tall tree with a large spreading canopy and is ubiquitous in the city.

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