99-Million-Year-Old Firefly-Like Fossil Trapped in Amber, Scientists Reveal It Is Unexpected New Species From Dinosaur EraA fossil from the late Mesozoic period was discovered in Myanmar, containing an ancient species of firefly that roamed the Earth approximately 145 to 65 million years ago, placing it in the same time period as the dinosaurs. So far, only two firefly fossils from the Mesozoic period have been discovered, with the earlier find dating back to 252 to 66 million years ago. The findings were published in the journal Proceedings of the Royal Society B: Biological Sciences. The fos…