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through fishers’ reports of each having caught up to 200 in a night in the early days of that fishery. In most places human-caused changes to marine ecosystems occurred over millennia while reliable information is often available for just the last few centuries at best. In New Zealand, however, which was first settled by fewer than 300 eastern Pacific islanders around 1280 AD, there is a comparatively short and continuous record of human impacts on the marine environment, including whaling for southern right whales. That’s consistent with analyses of scientifically-dated fish remains and historical data from England and northwestern Europe showing smaller freshwater fish and fewer species availability in early medieval times, likely caused by increased exploitation and pollution. Motherboard’s Becky Ferreira, this measure represents the difference between a species’ upper heat tolerance and its body temperature at both full heat exposure and in “thermal refuge,” or cooled down sanctuaries ranging from shady forests to the depths of the ocean. The responsibilities for the protection, conservation, and management of marine mammals under the MMPA and ESA are shared by the

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