yes they are I'm only in first grade but i was taught this
accidentallyIt was not anticipated and no theory predicted it. Once discovered theories had to be developed to explain the new phenomena observed.
Sir Issac Newton-- formulated theories of gravity Pierre and Marie Curie --discovered radioactivity Albert Einstein-- developed theories of relativity see links Rutherford. Discovered small charged nucleus of atom. Split the atom.
Harry Hammond Hess (1906-1969) developed theories of plate tectonics, particularly seafloor spreading as the source of new oceanic crust.
Nobody discovered it. The division of organisms into animal or plant kingdoms is something that developed over years
PCR was developed in 1984 by Kary Mullis.
accidentallyIt was not anticipated and no theory predicted it. Once discovered theories had to be developed to explain the new phenomena observed.
Sir Issac Newton-- formulated theories of gravity Pierre and Marie Curie --discovered radioactivity Albert Einstein-- developed theories of relativity see links Rutherford. Discovered small charged nucleus of atom. Split the atom.
he discovered 5 theories.
i wish i know the answer ....
Theories change because more/different information is discovered.
1831
pooey
Max Plank
This is a difficult question to answer as Freud developed numerous theories (many of them famous) over the course of his career. Also, one cannot tell if this question means to ask how long it took Freud to develop his theories or how long it took for his theories to be recognized and respected by the scientific community.
Johannes Kepler
He discovered the power of electricity, invented the light bulb, developed theories about DC (direct current), and proved the dangers of AC (alternate current).
he discovered digitalis which cures dropsey