I'm not even sure that I can pronounce this shape properly but scientists have discovered a new shape called 'Scutoid'. It is a form that despite being around for years has only been identified recently.
The discovery was made when a group of scientists were studying the cells that make up our skin and the outer layer of our organs. It is a shape that like the Pentagon can tile a floor without over-lapping each other or leaving gaps.
I'm glad that I didn't have to draw that at school!