Complex sentence: Horace-Bénédict de Saussure (February 17,1740--January 22,1799) was a Swiss aristocrat, physicist and Alpine traveller, often considered the founder of alpinism, and considered to be the first person to build a successful solar oven.
Split into simpler sentences: Horace-Bénédict de Saussure (February 17,1740--January 22,1799) was a Swiss aristocrat, physicist and Alpine traveller, often considered the founder of alpinism. And considered to be the first person to build a successful solar oven.