An underground flower petal home. It sounds like something out of a fairy tale.
But they exist! And astoundingly smart and wonderful little bees from Iran and Turkey are building them.
The solitary Osmia avosetta bee builds these "flower sandwiches", which have a layer of petals on the outside, a layer of mud, and then a final layer of petals inside. These nestle the little baby bee larva while it eats pollen and nectar, before it's sealed in to grow.
Pictures and info by way of National Geographic