Which of these would not be a VALID scientific theory?
A All cells come from pre-existing cells.
B Humans originated on earth from outer space.
C The universe is expanding at a constant rate.
D At one time, all of Earth's continents were one large land mass.
A All cells come from pre-existing cells.
B Humans originated on earth from outer space.
C The universe is expanding at a constant rate.
D At one time, all of Earth's continents were one large land mass.