The answer is "He continued his work to decipher more hieroglyphs on the Rosetta Stone."
Numerous individuals worked on deciphering hieroglyphs more than a few hundred years. In any case, the structure of the content was exceptionally hard to work out. After numerous long periods of concentrate the Rosetta Stone and different cases of antiquated Egyptian written work, Jean-François Champollion deciphered hieroglyphs in 1822.
Cheek cells do not have a cell wall. The cheek cell is also denser.
One way in which the ancient Sumerians, Egyptians, and Mayas are similar is that these civilizations developed irrigation systems.
