Climate security

Are humans a bigger threat than climate change?

Seventy-five percent of Americans believe that global warming is a “very” or “somewhat” serious problem, even if they continue to debate whether human activity is to blame. But it turns out that other species may face an even greater threat than climate change: humans themselves.

In 2004, professional research diver Brian Kakuk managed to inspect a Bahaman sinkhole whose layer of toxic water had put off other explorers – but had perfectly preserved fossils of species now extinct on Great Abaco Island. Mr. Kakuk and his colleagues published their findings Monday in the journal Proceedings of the National Academy of Sciences.