Wasps

Well-preserved fossil insect cocoons have allowed researchers in Argentina to describe how wasps bred in rotting dinosaur eggs. In 1989 scientists found the 70-million-year-old titanosaur eggs in southern Argentina, an area well known for fossils and dinosaur eggs They later saw that some of the broken eggs they found contained fossilized insect cocoons that were similar in size and shape to the cocoons of certain modern day wasps. There are many records of dinosaur eggs, and even several records of fossil cocoons. But author Jorge Genise says that "this is the first time that these cocoons are found closely associated with an egg." The results indicate that wasps probably participated in the food web, mostly composed of scavenging insects, which developed in the rotten egg. This is important to our knowledge because it gives us a better understanding on the world before humans.