Has RNA been proven?
RNA world
The RNA world is a hypothetical stage in the evolutionary history of life on Earth, in which self-replicating RNA molecules proliferated before the evolution of DNA and proteins. The term also refers to the hypothesis that posits the existence of this stage.
Vault RNA
As the field progressed into the 2000s, more research was done on the structure and biological capabilities of the molecule. More recently, there have been a few experiments on vault RNA.