For the first time, scientists have documented microplastics in frog tadpoles living in the wild Amazon rainforest - and the contamination showed up in every single pond and every single tadpole they tested. The finding, published April 11, in Scientific Reports, raises urgent questions about how deeply plastic pollution has penetrated even remote, sparsely populated corners of one of the planet's most biodiverse regions. What surprised researchers wasn't that they found microplastics. It was how much they found in a place considered relatively well preserved.