Scientists have discovered some weird facts about animals recently. For example, octopuses became more social and interested in their surroundings after being given MDMA. Dolphins exhibited strange behaviors when looking at themselves in a mirror. A chemical called MPTP can cause a movement disorder similar to Parkinson's disease. The UK government once planned on dropping anthrax cakes on Germany. And male mice are scared of the smell of bananas. These are just a few of the unusual discoveries shared on Reddit.