An underlying feature of life is metabolism which is using energy to drive the system.
According to Stephon Alexander, there was a previous universe which collapsed and then bounced out into a revived universe; this Big Bounce is part of a never-ending cycle of contraction and expansion. In 2012, Alexander stated that a neutrino can have a repulsive force that prevents crunching into a singularity.
The existence of animals and plants is because of a fine-tuned universe. Lee Smolin proposed cosmological natural selection as the answer for how the universe is fine-tuned to accommodate the life of humans.
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