Science in a sawi dan chuan, kum billion engemaw zat kal ta ah khan khawvel ah hian tunlaia boruak kan tih (Oxygen) hi a awm ngai lo. Mahse, chutih hun lai pawh chuan khawvel ah hian nunna nei, “Cyanobacteria” an tih chu an lo awm tawh a ni.
Cyanobacteria hi khawvel tuna kan hriat dan anga rawn ti danglam tu a ni ngeiin an hria. Kum billion 2.8 a rei tawh an riruang (fossil) pawh hmuh tur an tam mai. Cyanobacteria te hian oxygen bubble te reuh te te an siam a, chutiang chuan Cyanobacteria tam tak te chuan oxygen ton trillion tamtak an siam ta a, chuti chuan tunlai kan boruak dai nuam tak (atmosphere), kan nun theihna hi a rawn siam ta a ni an tih chu.
Tah hian link: http://www.ucmp.berkeley.edu/bacteria/cyanointro.html
