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Koalas’ noses are so distinctive they can be used to tell the animals apart in the wild, even at considerable distances. The discovery could cut costs for teams trying to save the beloved creatures, and also save humans and koalas alike from stress. Despite being a major part of Australia’s tourism industry, and possibly the most loved of all the continent’s distinctive fauna, koalas are in serious trouble. They are under threat from sexually transmitted disease, dogs, cars, and habitat loss. Global heating is not doing them any favors either, particularly by causing increasingly large fires. …

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