Simplify the following text for a Grade 10 native English-speaking person.
Original: Observations of earlier stages in the development of the universe , which can be seen at great distances , suggest that the universe has been governed by the same physical laws and constants throughout most of its extent and history .
Simplified: Earlier stages in the development of the universe can be seen at great distances . Observations suggest that the universe has been governed by the same physical laws and constants throughout most of its extent and history .