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250s

Centuries: 2nd century - 3rd century - 4th century

Decades: 200s - 210s - 220s - 230s - 240s - 250s - 260s - 270s - 280s - 290s - 300s

Years: 250 251 252 253 254 255 256 257 258 259


Events:



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Photosynthesis

... photosynthesis requires a source of hydrogen with which to reduce carbon dioxide into carbohydrates. Van Neil's proposal was confirmed 20 years later by using the O18 ...

 
 
 
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