Complex sentence: Theodore Seixas Solomons (1870-1947) was an explorer and early member of the Sierra Club; from 1892 to 1897 he explored and named the Mount Goddard, Evolution Valley and Evolution Basin region in what is now northen Kings Canyon National Park in eastern California.
Split into simpler sentences: Theodore Seixas Solomons (1870-1947) was an explorer and early member of the Sierra Club. From 1892 to 1897 he explored and named the Mount Goddard, Evolution Valley and Evolution Basin region in what is now northern Kings Canyon National Park in eastern California.