How could there be different explanations of the same event in history?

Are yar tumARE PAS SKETCH PEN TO HOGA . COLOUR KAR LO....................

No. Football history is the chronological events that happened in the sport. History is the chronological events of what happens to man-kind generally.

An isotope is simply a certain element with a different atomic mass, for example carbon 12 is the same element as carbon 13 because it has the same number of protons, but it has an atomic mass of 12...

Yes, look at the United States, in different parts of the country there are different accents but it is all the same dialect.

YES!!