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Exploration Expansion

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Arrival of anatomically modern humans in Europe (c. 45,000–35,000 BP)

52000 BCE - 33000 BCE

Armenian Genocide refugee flows and diaspora (1915–1923)

1914 - 1923

Arctic Council formation and science-policy initiatives (1996–present)

1991 - 2025

Arctic Aerial Mapping and Reconnaissance by Canadian and U.S. Survey Teams (1920s–1960s)

1920 - 1963

Archaeological and Scientific Investigations of HMS Erebus and HMS Terror (1981–2016)

1981 - 2016

Arab Spring and Social Media Mobilization (2010–2012)

2010 - 2012

Arab conquest of the Sasanian Empire (633–654)

602 - 651

Apple's iPhone Global Supply Chain Development (2007-2015)

2007 - 2015

Apollo Mission Control and Flight Operations at Houston (1962–1972)

1961 - 1972

Apollo Guidance, Navigation, and Computer System Development (1961–1969)

1961 - 1969

Apollo 9 (1969): Crewed Lunar Module Testing in Earth Orbit

1969

Apollo 8 (1968): First Crewed Lunar Orbit Mission

1967 - 1968

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