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Threshold 1 looks at the beginning of the universe - the Big Bang and what came out of it.
Not studying at Macquarie Uni? Check your school or local library for these titles.
The Scientific Companion: Exploring the physical world with facts, figures, and formulas by 
Introduction to the Theory of the Early Universe by Extension books have more in-depth information, but usually require some background knowledge in the area.
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Here are some helpful subject terms for threshold 1:
Ancient cosmologies?
Humans have grappled with the question of how the universe began throughout history, developing a number of cosmologies.
Try searching for cosmology, creation myths or mythology.
Ancient Astronomy An encyclopedia of cosmologies and myth by 
The Dancing Universe from creation myths to the big bang by 
