Despite their never-ceasing grins, axolotls have been at risk of extinction for years. Over two decades ago, there were about 6,000 of these tiny salamanders for every square kilometer in Lake ...

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If you've seen one of those pink smiling salamanders that look like a Pokémon, you might've been tempted to think: "I gotta catch 'em all." Or something like that. Those adorable wild creatures are ...