A manuscript that lay unnoticed by scientists for decades has revealed that Albert Einstein once dabbled with an alternative to the Big Bang theory, proposing instead that the Universe expanded steadily and eternally.
- What is the subject for "proposing"? Is that "A manuscript" or "the Big Bang theory"? Is there a rule to distinguish?
- What does the word "instead" in this sentence mean? If I omit it, will I change the main idea of the sentence?