On Our Radar: Twelve Quaggas Clogging An expert on invasive species adjusts the "Twelve Days of Christmas" lyrics to educate people about threats and prevention in the Great Lakes. The Journal Sentinel Young tree-sitters and other protesters campaigning against the Keystone XL pipeline learn that the East Texas authorities are often willing to hand out hefty jail sentences. A grim travelogue details where "climate change kills the most people." With their vast populations, China and India rank No. 1 and 2; Nigeria ranks third, with the drought in the southern Sahara a growing factor. Urban carnivores of the nonhuman variety are on the rise, and not just because climate change and development are eroding their habitats. Their numbers have also risen because of conservation efforts, and the animals generally view humans as less threatening than they used to. Popular Science