Add spaces: 1kmtothenearestbusstop

Answer: 1 km to the nearest bus stop

Add spaces: newsletter,mybrotherisdoingwellandhischeckupshavebeenextendedfrom3

Answer: newsletter, my brother is doing well and his checkups have been extended from 3

Add spaces: Buthowplantsandanimalsonlanddiedoutisonethingthatpuzzlesandsurprisesmany,actuallythereisnologicalexplanationbutmostbelieveitisthemergerofPangeatodo,thatsomethinghappenedthenthatnoonecanreallyexplain.

Answer:
But how plants and animals on land died out is one thing that puzzles and surprises many, actually there is no logical explanation but most believe it is the merger of Pangea to do, that something happened then that no one can really explain.