SQL & PL/SQL :: Row Modify In Table?

is there any way we can find out which row is updated in oracle table if we don't have any date/time column in table.

let say.

Create table T1 (ename varchar2(200), age number);

insert into T1 values ('A',20);
insert into T1 values ('B',30);
insert into T1 values ('C',40);
insert into T1 values ('D',50);

commit;

update t1 set age=50 where ename='A'

commit;

looking some oracle query which identify which record is update in table in given time period.