RNA segments in the spliceosome have a domain V counterpart with a 2-nucleotide bulge located 5 base pairs away from an AGC triad. The formation of a metal-binding platform in this region of U6 may explain the ability of spliceosomal RNAs to retain catalytic activity in the absence of most protein components. A domain V-like element may have played a major role in the RNA world era, serving as a catalytic center for RNA cleavage, transesterification, and polymerization. The new structure provides a starting point for future studies of group II introns and the spliceosome. However, the lack of electron density for domain VI and the absence of exons prevent understanding how these elements dock onto the surface formed by domains I to V. The conformational change separating the two steps of splicing remains unclear. Capturing other intermediates along the splicing pathway and linking structural features to functional interactions will be important for understanding group II intron self-splicing. Climate change promotes harmful cyanobacterial blooms by increasing temperatures, enhancing water stratification, and altering precipitation patterns. These conditions favor cyanobacteria, which form buoyant cells that float to the surface and form dense blooms. Cyanobacterial blooms can increase water temperatures, further promoting their dominance. Additionally, rising salinities in many regions favor salt-tolerant cyanobacteria. Some species have expanded their geographical ranges due to global warming and eutrophication. Cyanobacterial blooms can have serious ecological and health impacts, including oxygen depletion, toxin production, and habitat disruption. Understanding the population dynamics of these blooms is crucial for managing aquatic ecosystems. High nutrient loading, rising temperatures, and increased stratification all favor cyanobacterial dominance. Water managers must consider these factors in strategies to combat the expansion of cyanobacterial blooms.RNA segments in the spliceosome have a domain V counterpart with a 2-nucleotide bulge located 5 base pairs away from an AGC triad. The formation of a metal-binding platform in this region of U6 may explain the ability of spliceosomal RNAs to retain catalytic activity in the absence of most protein components. A domain V-like element may have played a major role in the RNA world era, serving as a catalytic center for RNA cleavage, transesterification, and polymerization. The new structure provides a starting point for future studies of group II introns and the spliceosome. However, the lack of electron density for domain VI and the absence of exons prevent understanding how these elements dock onto the surface formed by domains I to V. The conformational change separating the two steps of splicing remains unclear. Capturing other intermediates along the splicing pathway and linking structural features to functional interactions will be important for understanding group II intron self-splicing. Climate change promotes harmful cyanobacterial blooms by increasing temperatures, enhancing water stratification, and altering precipitation patterns. These conditions favor cyanobacteria, which form buoyant cells that float to the surface and form dense blooms. Cyanobacterial blooms can increase water temperatures, further promoting their dominance. Additionally, rising salinities in many regions favor salt-tolerant cyanobacteria. Some species have expanded their geographical ranges due to global warming and eutrophication. Cyanobacterial blooms can have serious ecological and health impacts, including oxygen depletion, toxin production, and habitat disruption. Understanding the population dynamics of these blooms is crucial for managing aquatic ecosystems. High nutrient loading, rising temperatures, and increased stratification all favor cyanobacterial dominance. Water managers must consider these factors in strategies to combat the expansion of cyanobacterial blooms.