In the early 1900s, scientists began studying magnetic materials other than those based on iron and steel. By the 1930s, researchers had produced the first powerful Alnico alloy permanent magnets.
In 1966 the first rare earth magnets were developed from Samarium-Cobalt (SmCo 5 ) producing a high energy product of 18 MGOe. In 1972 further developments were made using Samarium-Cobalt (Sm 2 Co 17 ) to produce a higher energy magnet product of 30 MGOe.
In 1983 General Motors, Sumitomo Special Metals and the Chinese Academy of Sciences developed a high energy product of 35 MGOe from a compound of Neodymium-Iron-Boron (Nd2Fe14B) referred to as neo magnets or rare earth magnets. The enormous interest these magnets have generated arises because, for the first time, a new magnetic material has been introduced which is not only stronger than the previous generation but is more efficient. Neo magnets are the strongest type of permanent magnet in the world.
Today magnets play a role almost every technologically advanced device we use, including computers, automobiles, industrial sorter and seperators, power generators, speakers, cell phones etc.
Unidentified flying object (commonly abbreviated UFO ) is a term used to refer to any aerial phenomenon whose cause can not be easily or immediately determined. Both military and civilian research show that a significant majority of UFO sightings are identified after further investigation, either explicitly or indirectly (through the presence of clear and simple explanatory factors: see Occam's Razor .  The United States Air Force , who coined the term in 1952, initially defined UFOs as those objects which remain unidentified after scrutiny by expert investigators,  though the term UFO is often used more generally to describe any sighting unidentifiable to the reporting observer(s). Popular culture frequently takes the term UFO as a synonym for alien spacecraft . Some investigators now prefer to use the broader term Unidentified Aerial Phenomenon (or UAP ), to avoid the confusion and speculative associations that have become attached to UFO . 
The new Chancellor Cai Que ( 蔡確 ; 1036–1093) held Shen responsible for the disaster and loss of life.  Along with abandoning the territory which Shen Kuo had fought for, Cai ousted Shen from his seat of office.  Shen's life was now forever changed, as he lost his once reputable career in state governance and the military.  Shen was then put under probation in a fixed residence for the next six years. However, as he was isolated from governance, he decided to pick up the ink brush and dedicate himself to intensive scholarly studies. After completing two geographical atlases for a state-sponsored program, Shen was rewarded by having his sentence of probation lifted, allowing him to live in a place of his choice.  Shen was also pardoned by the court for any previous faults or crimes that were claimed against him.