Complex sentence: Jake Meyer (born 20 January 1984) is the youngest Briton to climb Mount Everest (aged 21 years 4 months) and the youngest male to complete the "'Seven Summits'"--the highest mountains in each of the seven continents.
Split into simpler sentences: Jake Meyer (born 20 January 1984) was the youngest Briton to climb Mount Everest (aged 21 years 4 months). Jake is also the youngest male to complete the "'Seven Summits'"--the highest mountains in each of the seven continents.