Core Findings - A new prehistoric fish species named "Antarctic Long-chest Fish" has been discovered in the Antarctic Peninsula, dating back to the Cretaceous period, approximately 145 million to 66 million years ago [1][2] - The research was part of the "Ancient Antarctica Project" conducted during the summer of 2018-2019, involving experts from various Brazilian institutions [1] - The fossil was digitally reconstructed using micro-CT scanning technology, resulting in over 2,000 images that restored the original morphology of the fish [1] Research Implications - The fish is estimated to be about 8 to 10 centimeters in length and features a slender head [1] - The study highlights the significance of Antarctic paleobiology in understanding the evolution of life in the Southern Hemisphere and the formation of modern biodiversity [1] - The findings suggest that the currently ice-covered Antarctic continent may have once been a lush, biodiverse environment, which could reshape our understanding of ancient ecosystems' responses to environmental changes, particularly in the context of current climate change [1]