1 2 3 1 _ _ _ 2 _ _ _ 3 _ _ _ ACROSS 1) how long something has existed 2) an artifact designed to be played with 3) united states writer and ___t (1809-1849) DOWN 1) a nucleotide derived from adenosine that occurs in muscle tissue; the major source of energy for cellular reactions 2) any thick, viscous matter 3) the organ of sight ** Scroll down for solution. ** Are you sure you want to peek? age toy poe