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Biography
Aristarchus of Samos (c. 320–c. 250 BC)
Biography
Aristotle (384–322 BC)
Biography
Arp, Halton Christian (1927–2013)
Article
Assisted reproductive technology
Any treatment or procedure that includes the in-vitro handling of oocytes (immature ova or egg cells) and sperm or embryos for the purpose of establishing a pregnancy. Assisted reproductive technology (ART) is undertaken as a treatment of…
Biography
Atkinson, Robert D'escourt (1898–1982)
Biography
Attenborough, David Frederick (1926– )
Biography
Audubon, John James Laforest (1785–1851)
Biography
Avery, Oswald Theodore (1877–1955)
Biography