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Tier 5 species usually begin focusing on clean energy production. The occasional belligerent species will use atomic energy for weapons, often resulting in mass extinctions. In-atmosphere craft are a hallmark, often leading to manned space flight, albeit in a short-scale. | Tier 5 species usually begin focusing on clean energy production. The occasional belligerent species will use atomic energy for weapons, often resulting in mass extinctions. In-atmosphere craft are a hallmark, often leading to manned space flight, albeit in a short-scale. | ||
Humanity entered this age in 1945, when the first [[nuclear weapon|atomic bombs]] were dropped. The [[San'Shyuum]] [[Stoics]] of [[Janjur Qom]] were at this level in [[852 BCE]].<ref>'''[[Halo: Broken Circle]]''', ''page 89''</ref> | Humanity entered this age in 1945, when the first [[nuclear weapon|atomic bombs]] were dropped on Hiroshima and Nagaski in Japan. The [[San'Shyuum]] [[Stoics]] of [[Janjur Qom]] were at this level in [[852 BCE]].<ref>'''[[Halo: Broken Circle]]''', ''page 89''</ref> | ||
==Tier 4: Space Age== | ==Tier 4: Space Age== |
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