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{{short description|British astronomer}} | nationality = British ...

Since antiquity, astronomers have progressively refined the definition of the tropical year. The entry f In the 2nd century BC [[Hipparchus]] measured the time required for the Sun to travel from an ...

...British Agriculture|great agricultural depression]] during the early 20th century.<ref name="SA" /> His paternal great-grandmother saved the family from fina ...cal physics]] questions rather than those requiring factual knowledge. A [[British undergraduate degree classification#First Class Honours|first-class degree] ...

...or [[panemone windmill]] first appeared in [[Greater Iran]] during the 9th century.<ref>Glick, Thomas F., Steven Livesey, and Faith Wallis. Medieval science, The 9th century mathematician [[Muhammad ibn Musa al-Khwarizmi]] founded algebra and expand ...

...midst of the [[History of molecular biology|molecular revolution]], a half-century after the origins of theoretical population genetics: they were soon widely In the early 20th-century, authors such as [[Theodor Eimer|Eimer]] or [[Edward Drinker Cope|Cope]] he ...