The platypus, the egg-laying mammal

"Platypuses. They’re weird. But according to new research they might actually be lifesavers; proteins in their milk have potential to be a new and powerful antibiotic. 

The potential value comes from the sheer weirdness of the milk proteins; they are unlike any other on Earth. In fact, platypuses are so unusual that it took taxonomists more than eighty years just to decide what they are"

"Along with echidnas, platypuses are the last of the monotremes, or egg-laying mammals. They are nocturnal, and they use their flexible bill filled with electrosensors to detect buried prey underneath the murky water."