APR 18 1970, MAY 08 1970, MAY 13 1970; Chris O'Neal, 10, helps ***** Alison, 6, dip for water organi
APR 18 1970, MAY 08 1970, MAY 13 1970; Chris O'Neal, 10, helps ***** Alison, 6, dip for water organisms ***** study. They attend University Park ***** School.; (Photo By Millard Smith/The Denver Post via Getty Images)