Mirror life, also known as mirror-image life, is a hypothetical form of life composed of molecular building blocks that are mirror reflections of those in natural life. Natural life on Earth uses molecules with specific "handedness" or chirality—left-handed amino acids and right-handed sugars—whereas mirror life would use the opposite, with right-handed amino acids and left-handed sugars. This complete molecular reversal would produce organisms that are essentially the mirror images of natural living beings, including mirror DNA and mirror proteins. Currently, mirror life has not been found in nature and remains a scientific concept. However, advances in synthetic biology have made it conceivable that mirror organisms could one day be artificially created in laboratories, although this is beyond present scientific capabilities. Some mirror components such as mirror proteins and efforts to create mirror ribosomes have been achieved experimentally. Mirror life would be biochemically distinct from natural life and would not interact with natural organisms in typical ways—for example, mirror viruses would not infect normal cells and vice versa. This uniqueness could lead to potential uses in drug development, but also raises serious concerns about ecological and health risks. Scientists warn that mirror bacteria could evade immune systems and outcompete natural organisms, potentially causing widespread harm to ecosystems and human health. The scientific community remains divided: some call for strict caution and regulation before any mirror organisms are created, citing possible irreversible impacts, while others argue that the risks are theoretical and research should continue with appropriate safety measures. In summary, mirror life is a theoretically possible life form made of molecules that are the exact mirror images of those found in natural organisms, representing a fascinating frontier in synthetic biology with both promising applications and significant ethical and safety concerns.