Solenodons are quite amazing mammals because they have poisonous teeth. They are almost as old as the earliest mammals (78 million years) and have mammary glands near their buttocks. Some solenodons have a ball and socket joint to increase the flexibility of the snout for foraging invertebrates.
They belong to the order Soricomorpha, that includes shrews and moles and are found entirely in the Caribbean.
They are also listed as endangered due to the introduction of alien species in their habitat.