==Achievements, listed by age at which they were made==
* '''7''' - Yehudi Menuhin gives his first solo violin performance with the San Francisco Symphony in 1923.
* '''8''' - [[Frederic Chopin]] plays his first public piano performance, having already authored two polonaises (G minor and B flat major) at age 7.
* '''10''' - [[Mark]], author of the [[Gospel of Mark]], witnesses the arrest of Jesus and develops the first [[Gospel]].
* '''10''' - [[Michael Kearney]], [[homeschooled]], becomes the world's youngest university graduate.<ref>He earned a bachelor's degree from the University of South Alabama.</ref>At age 17, began a teaching career at college. <ref>[http://answers.yahoo.com/question/index?qid=20080617185918AAum3vj Who is the YOUNGEST person to graduate college?] Yahoo Answers</ref>
*'''10''' - Kathryn Aurora Gray, of Fredericton, New Brunswick, discovered supernova 2010lt.
* '''12''' - [[Blaise Pascal]] had secretly worked out the first twenty-three propositions of Euclid by himself.
* '''12''' - [[Jesus]] presents His wisdom in the temple in [[Jerusalem]].
* '''12''' - William "Willie" Johnson earned the [[Medal of Honor]] for his actions during the [[Seven Days Battle]] and on the [[Peninsula Campaign]] during the [[American Civil War]]. [http://www.homeofheroes.com/moh/citations_1862_cwh/johnston_willie.html]
* '''13''' - [[Jonathan Krohn]] homeschooled, actor, internet radio host, guest speaker at [[CPAC]], author of ''Defining Conservatism''.
* '''13''' - [[John]] wrote the first draft of the [[Gospel of John]], the greatest written work of all time.<ref>[[Mystery:Was John a Child?]]</ref>
* '''19''' - [[Mark Zuckerberg]] commercializes [[Facebook]], which later became the leading social networking system on the [[internet]].
* '''19''' - Jim Ryun broke the world record for running the mile.
* '''20''' - Carl Friedrich Gauss makes his first mathematical discoveries, which will lead to the completion of "Disquisitiones Arithmeticae", his magnum opus, at the age of 21.
* '''20''' - Willis Carrier invents air conditioning.
(add more, sorted by age and then alphabetically)