what did robert hooke discover?
Based on his design, a marine chronometer accurate enough to measure longitude was eventually constructed by John Harrison in the 18th century.
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 Robert Hooke , English natural philosopher and biologist 

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 Hooke was prepared to accept the possibility that some such fossils represented species that had become extinct , possibly in past geological catastrophes . 

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 It was largely confirmed by an account provided by Aldo Lampredi and the " classical " narrative of the story was set out in books written in the 1960s by Bellini delle Stelle and Urbano Lazzaro , and the journalist Franco Bandini . Although each of these accounts vary in detail , they are consistent on the main facts . 

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 The journal of John Crawfurd records another method of execution by elephant in the kingdom of Cochinchina ( modern south Vietnam ) , where he served as a British envoy in 1821 . Crawfurd recalls an event where " the criminal is tied to a stake , and [ Excellency 's favourite ] elephant runs down upon him and crushes him to death . " 
