According to a new study published in the journal PLoS Genetics, dwindling populations created a ‘mutational meltdown’ in the genomes of the last wooly mammoths, which had survived on Wrangel Island in the Arctic Ocean until about 3,700 years ago. This is an artist’s rendition of a woolly mammoth. Image credit: Flying Puffin / CC BY-SA 2.0. Woolly mammoths (Mammuthus primigenius) were among the most common large herbivores in North America,...