Einstein’s theory of relativity came not from __________ data, but from a number of __________ experiments (wondering ‘what if’), which require creative imagination.
Scientists are often reluctant to __________ new theories when they overturn long established explanations, this was the case for Einstein’s relativity. Scientists were unable to test Einsteins ideas at that time.
However, Einstein’s theory of relativity is now widely believed because it led to __________ which were tested successfully in different situations. Scientists have carried out independent studies into atomic clocks and cosmic rays and their measurements/results agree with Einstein's theory.