Simplify the following text for a Grade 10 native English-speaking person.
Original: He won the Nobel Prize in Physiology or Medicine in 2009 for his discoveries of how chromosomes are protected by telomeres which he shared with Elizabeth Blackburn and Carol W. Greider .
Simplified: He was awarded the 2009 Nobel Prize for Physiology or Medicine , along with Elizabeth Blackburn and Carol W. Greider , for the discovery of how chromosomes are protected by telomeres .