Homochirality Emergence: A Scientific Enigma with Profound Implications in Origins of Life Studies

Homochirality, the ubiquitous preference of biological molecules, such as amino acids, sugars, and phospholipids, for a single enantiomeric form, is a fundamental characteristic of life. This consistent bias across the biosphere, where proteins predominantly utilize L-amino acids and nucleic acids predominantly utilize D-sugars, is not merely a biochemical peculiarity but a crucial aspect of life’s molecular architecture. However, the origin of this homochirality remains one of the most compelling and unresolved mysteries in the study of life’s origins, drawing inquiry from fields as diverse as cosmology, physics, chemistry, and biology. This article provides an overview of chirality’s pervasive influence across these domains, tracing its potential origins from early Earth’s conditions to its pivotal role in shaping both natural phenomena and the technological advancements that define our future.