1940 ⟶ Neptunium Synthesized
Neptunium is synthesized.
Year
1940
1943
1945
1955
1993
⚛️ Discovery of Plutonium-239
Pu-239 isotope (isotope of plutonium) a form of matter existing with the capacity for use as a destructive element (because the isotope has an exponentially increasing spontaneous fissile decay) within nuclear devices — Glenn Seaborg.⟶
Nuclear PhysicsRadioactivityManhattan Project
United States🧬 Avery's Experiment: DNA Identified as Genetic Material
Oswald Avery proves that DNA is the genetic material of the chromosome⟶
GeneticsDNAMolecular BiologyBiologyResearchMedical Advancements
United States🧪 Willard Libby Begins Radiocarbon Dating Research
Willard Libby began his work on radiocarbon dating. He published his paper in 1946, a second paper in Science in 1947. Libby and James Arnold succeeded with the radiocarbon dating theory after results were published in Science in December 1949.⟶
ArchaeologyPhysicsChemistryHistory
United States⚛️ Antimatter First Synthesized
Antimatter first produced.⟶
PhysicsParticle PhysicsFundamental ParticlesExperimental PhysicsDiscovery
United States🧪 Biosphere 2 Mission 1 Concludes
September 26: The first mission in Biosphere 2 ends after two years.⟶
Environmental ScienceEcologySpace ExplorationSustainabilityResearch
United States