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The U.N. climate meeting underway in Poland is the most important climate conference since the 2015 Paris Agreement set emissions reduction goals for nearly every country on Earth.
Modern birds are dinosaurs without toothy jaws, and with bigger brains. Newly published research fills in some of the missing links in their evolution.
In many parts of the world, it is illegal to shoot a brown bear with cubs. The restrictions have made mother bears more likely to spend an extra year with their cubs.