(Business Insider) - Worms may not have spines, but they're doing some back-breaking sewer work in more than 4,000 toilets across India. Since 2015, a creative new type of toilet called the Tiger Toilet has been popping up outside homes and schools around the country. From the outside, this toilet looks like any other pit latrine. But it doesn't smell like one. Instead, it comes with a built-in population of tiger worms. Read More
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