The anthropic principle suggests that the universe's fundamental parameters are as they are because they allow for the existence of observers like humans. It implies that the universe must be compatible with conscious life to be observed and understood.
Big Bang Theory: The leading explanation about how the universe began, proposing it started from a small singularity and expanded over billions of years.
Fine-Tuning Argument: The proposition that certain conditions or constants in physics are precisely set to allow for life, supporting some interpretations of the anthropic principle.
Cosmological Constant: A value representing energy density in empty space, crucial for understanding cosmic expansion and related to discussions on fine-tuning.