When was THETA fuel launched?

In the realm of cryptocurrency and blockchain technology, the emergence of THETA fuel has been a significant event. Given its role as a critical component within the THETA network's ecosystem, I'm curious to delve deeper into its origins. Could you please elaborate on the exact date when THETA fuel was officially launched? This information would be invaluable in understanding its journey from inception to the present, and how it has evolved within the cryptocurrency landscape. Your insights would greatly contribute to my understanding of this fascinating topic.