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) a share of 22%. The episode received 5.00 million views overall, and it received an Appreciation Index of 85, the joint highest score of Twelfth Doctor episodes along with "Dark Water" from the eighth series. "World Enough and Time" received overwhelmingly positive reviews from television critics, with many of them hailing it the best episode of the tenth series, but also criticizing the network for spoiling the cliffhanger early on. The episode currently holds an approval rating of 100% on Rotten Tomatoes, the site consensus reading, "World Enough and Time" sets up the conclusion of "Doctor Who"'s tenth season with