“Last November, officials in nearby Carver county removed as many as 50,000 goldfish from local waters.” Why? Well, for one reason, they grow to enormous sizes. Goldfish dumped in lakes grow to monstrous size, threatening ecosystems. (So, what, are people dumping goldfish into lakes because they find them too difficult to care for at home?)

+ WaPo: Crowds pack Bangladesh farm to see dwarf cow thought to be one of the world’s tiniest.