Decades: 60s BC 50s BC 40s BC 30s BC 20s BC - 10s BC - 0s 10s 20s 30s 40s
Years: 15 BC 14 BC 13 BC 12 BC 11 BC 10 BC 9 BC 8 BC 7 BC 6 BC 5 BC
Births
Deaths
... 20 years later by using the O18 isotope of oxygen as a tracer label to follow the fate of oxygen atoms during photosynthesis. Light-dependant reaction The fir ...