Compound lever sudden movement of the key. The earliest remaining writings regarding levers date from the 3rd century BC and were provided by Archimedes. ""Give me a place to stand, and I shall move the earth with a lever"" is a remark attributed to Archimedes, who formally stated the correct mathematical principle of levers (quoted by Pappus of Alexandria). The idea of the compound lever is attributed to the Birmingham inventor John Wyatt in 1743, when he designed a weighing machine that used four compound levers to transfer a load from a weighing platform to a central lever from which the weight
World Enough and Time (Doctor Who) World Enough and Time (Doctor Who) "World Enough and Time" is the eleventh and penultimate episode of the tenth series of the British science fiction television series "Doctor Who". It was written by Steven Moffat, directed by Rachel Talalay, and was broadcast on 24 June 2017 on BBC One. The episode received overwhelmingly positive reviews from television critics. In the episode, the Doctor (Peter Capaldi), Bill (Pearl Mackie), Nardole (Matt Lucas), and Missy (Michelle Gomez) answer a distress call from a gigantic ship trying to escape a black hole. It is the first episode of a two-part story which concludes