Simplify the following text for a Grade 7 native English-speaking person.
Original: Its collections , which number more than seven million objects , are amongst the largest and most comprehensive in the world and originate from all continents , illustrating and documenting the story of human culture from its beginnings to the present .
Simplified: It has more than seven million objects from all continents . They illustrate and document the story of human culture from its beginning to the present .