Lincolnshire reaching between 4.7 and 5.3 on the Richter magnitude scale; it was one of the largest earthquakes to affect Britain in recent years. Lincolnshire is home to Woolsthorpe Manor, birthplace and home of Sir Isaac Newton. He attended The King's School, Grantham. Its library has preserved his signature, carved into a window sill when he was a youth. Bedrock in Lincolnshire features Jurassic limestone (near Lincoln) and Cretaceous chalk (north-east). For much of prehistory, Lincolnshire was under tropical seas, and most fossils found in the county are marine invertebrates. Marine vertebrates have also been found including ichthyosaurus and plesiosaur .
Premiership of Margaret Thatcher war and defeated Argentina to recover the Falkland Islands. She was a leader in the coalition against Iraq's invasion of Kuwait. She developed an excellent relationship with U.S. President Ronald Reagan. Since the death of Margaret Thatcher in 2013, several government documents relating to her premiership have been declassified and released by the National Archives. Papers released in December 2014 show that Thatcher completely disapproved of GCSEs which, in 1986, Sir Keith Joseph was trying to introduce in the face of fierce opposition from teaching unions. At very least she wanted a 2-year delay to ensure rigorous syllabuses and adequate