#Genomics

Two major developments this week highlight evolving understanding of genome function. Researchers have reassessed transposable elements—mobile DNA sequences comprising nearly half the human genome—shifting from viewing them as evolutionary junk to recognizing their roles in genetic regulation and trait development across species. Separately, AI agents working within a new biology laboratory have detected previously unknown DNA sequences in giant viruses that structurally resemble microbial CRISPR immune systems, though their actual function remains unclear. Together, these findings underscore how advanced tools and reconsidered assumptions are revealing hidden complexity within genomes and expanding what scientists recognize as functionally significant DNA.