Breathing liquids, particularly perfluorocarbons, have shown promising results in experiments, with rats surviving for up to 20 hours while breathing these substances. Current research is exploring the potential for human applications, particularly in medical scenarios such as aiding premature infants with underdeveloped lungs. While there have been advancements, significant challenges remain, including safety, efficacy, and the physiological impacts on human lungs. The use of highly oxygenated fluids in neonatal care has been noted, but comprehensive human trials on breathing liquids are still limited, indicating that further investigation is needed before widespread application can occur.