@ Alchemy- An interesting fact about platypus venom is that it may one day prove to be medically beneficial. The defensin proteins in platypus venom are similar to the defensin retrocyclin, which has proved somewhat effective against the transmission of HIV, Herpes simplex, and Influenza.
Defensins are essentially proteins created by the immune system to protect the body against bacterial and viral pathogens. Baby marsupials are coated in defensins to help protect them against bacterial and viral infection. Who knows what beneficial medicines may one day evolve from the venom of something like a platypus.