The theory of relativity usually encompasses two interrelated theories by Albert Einstein: special relativity and general relativity. Special relativity applies to elementary particles and their interactions, describing all their physical phenomena except gravity. General relativity explains the law of gravitation and its relation to other forces of nature. It applies to the cosmological and astrophysical realm, including astronomy. 

The theory transformed theoretical physics and astronomy during the 20th century, superseding a 200-year-old theory of mechanics created primarily by Isaac Newton. It introduced concepts including spacetime as a unified entity of space and time, relativity of simultaneity, kinematic and gravitational time dilation, and length contraction. In the field of physics, relativity improved the science of elementary particles and their fundamental interactions, along with ushering in the nuclear age. With relativity, cosmology and astrophysics predicted extraordinary astronomical phenomena such as neutron stars, black holes, and gravitational waves. 

Albert Einstein published the theory of special relativity in 1905, building on many theoretical results and empirical findings obtained by Albert A. Michelson, Hendrik Lorentz, Henri Poincaré and others. Max Planck, Hermann Minkowski and others did subsequent work. 

Einstein developed general relativity between 1907 and 1915, with contributions by many others after 1915. The final form of general relativity was published in 1916. QUESTIONS:

Q1:
1. What did Albert Einstein reveal in 1905?
2. What was one of Albert Einstein's publications in 1905?
3. In 1905 what did Albert Einstein come out with?
Q2:
1. Did Albert Einstein's theory of relativity draw on any other sources?
2. Was Albert Einstein's theory of relativity inspired by other sources?
3. Did Albert Einstein get inspiration for his theory of relativity from other people?
Q3:
1. What was one theoretical source of Albert Einstein's theory of relativity?
2. Who was one researcher that helped Albert Einstein create his theory of relativity?
3. Who was one person whose theories Albert Einstein used to create his theory of relativity?
Q4:
1. What was one theoretical source of Albert Einstein's theory of relativity, besides Albert A. Michelson?
2. Who was one researcher that helped Albert Einstein create his theory of relativity, in addition to Albert A. Michelson?
3. Who was one person whose theories Albert Einstein used to create his theory of relativity, other than Albert A. Michelson?
Q5:
1. Did anyone inspire Einstein's theory of relativity, besides Albert A. Michelson and Henri Poincaré?
2. Was there anyone that led Einstein to develop his theory of relativity, in addition to Albert A. Michelson and Henri Poincaré?
3. Who was one person whose theories Albert Einstein used to create his theory of relativity, other than Albert A. Michelson or Henri Poincaré?
Q6:
1. Did anyone base their own work upon Einstein's?
2. Did Einstein's theories serve as the basis for those of anyone else?
3. Did the theories Einstein develop lead to others that were later developed?
Q7:
1. Who based his theories upon those of Einstein?
2. Whose work drew on the theories of Einstein?
3. Who was one scientist that used Einstein's theories to create his own?
Q8:
1. Who did a theory of mechanics belong to?
2. Who was the source for a theory of mechanics?
3. What scientist was responsible for a theory of mechanics?
Q9:
1. How long had Isaac Newton's theory of mechanics been around?
2. For how long has Isaac Newton's theory of mechanics existed?
3. For how much time had people known about Isaac Newton's theory of mechanics?
Q10:
1. Did Albert Einstein's theory supercede that of Isaac Newton?
2. Was Isaac Newton's theory superceded by that of Albert Einstein?
3. Was Albert Einstein's new theory given priority over the old one of Isaac Newton?
Q11:
1. What was one concept that Albert Einstein's theory of relativity introduced?
2. What was one of the concepts that came out of Albert Einstein's theory of relativity?
3. What was a concept that resulted from Albert Einstein's theory of relativity?
Q12:
1. What was one concept that Albert Einstein's theory of relativity introduced, other than spacetime as unified entity of space and time?
2. What was one of the concepts that came out of Albert Einstein's theory of relativity, in addition to spacetime as unified entity of space and time?
3. What was a concept that resulted from Albert Einstein's theory of relativity, besides spacetime as unified entity of space and time?
Q13:
1. What field was Einstein's theory of relativity beneficial to?
2. What field did Einstein's theory of relativity improve?
3. What field saw improvements as a result of Einstein's theory of relativity?
Q14:
1. What did Einstein's theory of relativity usher in?
2. What was ushered in as a result of Albert Einstein's theory of relativity?
3. What did Einstein's new theory bring about?
Q15:
1. Is Godzilla going to crush Japan and take over the world?
2. Do we know if Godzilla is going to destroy Japan and move onto world domination?
3. Is it clear whether or not Japan will be taken over by Godzilla, who will then take over the world?
Q16:
1. What extraordinary phenomena has the theory of relativity been used to predict?
2. What are the incredible things that have been predicted using relativity?
3. What out-of-this-world phenomena has relativity been able to forsee?
Q17:
1. What extraordinary phenomena has the theory of relativity been used to predict, besides neutron stars?
2. What are the incredible things that have been predicted using relativity, in addition to neutron stars?
3. What out-of-this-world phenomena has relativity been able to forsee, such as neutron stars?
Q18:
1. What extraordinary phenomena has the theory of relativity been used to predict, besides neutron stars and black holes?
2. What are the incredible things that have been predicted using relativity, in addition to neutron stars and black holes?
3. What out-of-this-world phenomena has relativity been able to forsee, such as neutron stars or black holes?
Q19:
1. When did Albert Einstein publish the final draft of his theory of relativity?
2. When did Einstein come out with the final form of his theory of relativity?
3. When was the final version of Einstein's theory of relativity made public?
Q20:
1. How much time did Albert Einstein spend perfecting his theory of relativity?
2. How long did it take Einstein to fully develop his theory of relativity?
3. How long did Albert Einstein need to create the finalized version of his theory of relativity?
