<p>Recent analysis of samples from asteroids Ryugu and Bennu did not reveal any significant amino acid enantiomeric excesses, and these facts appear to contradict the most prevailing view that a slight enantiomeric excess of <span>l</span>-amino acids present on the primitive Earth is the origin of homochirality. From the perspective of continuity in biological evolution, it would again be considered a strong possibility that primordial tRNA aminoacylation could have led to preferential homochiral (<span>l</span>-) protein biosynthesis on the early Earth (Tamura–Schimmel model), and that RNA played a major role in the generation of amino acid homochirality.&#xa0;The results of recent molecular dynamics simulations have also clarified the mechanism of its chiral selectivity.</p>