Decades: 1190s 1200s 1210s 1220s 1230s - 1240s - 1250s 1260s 1270s 1280s 1290s
Years: 1241 1242 1243 1244 1245 - 1246 - 1247 1248 1249 1250 1251
Births
Deaths
... to note that the oxygen released during photosynthesis is not in fact derived from the carbon dioxide, but rather from the water molecules which are consumed in the ...