Short answers, pulled from the story.
Miles Dewey Davis III arrived in the world on the 26th of May 1926, born into an affluent African-American family in Alton, Illinois. The family moved to East St. Louis in 1927, living on the second floor of a commercial building behind a dental office.
Davis dropped out after three semesters in mid-1945 because he wanted to perform full-time rather than study classical European repertoire. He spent much of his time seeking Charlie Parker at clubs like Minton's and Monroe's instead of attending classes.
In A Silent Way recorded in February 1969 featured musicians including Chick Corea and John McLaughlin alongside Shorter and Hancock. This album reached number 134 on US Billboard Top LPs chart and led to performances opening for rock bands starting March 1970.
Miles Davis died the 28th of September 1991 following an intracerebral hemorrhage caused by a medical dispute over tracheal tube implantation. His death was attributed to combined effects of stroke pneumonia and respiratory failure while hospitalized near Santa Monica California.
Walkin released April 1954 is considered by some critics as the album that created hard bop genre while Birth of the Cool compiled from sessions until April 1950 produced thickly textured orchestral sounds. These works distanced himself from bebop origins and influenced generations of jazz musicians.