In the Kubler-Ross model, the denial stage is defined as a starting point in the process, a time to process the loss.

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Principal investigator Joe Veverka from Cornell University said the alterations were driven by the process material loss as the comet orbited the Sun.

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"It's been really comforting for me to reflect on small things rather than where I am with my weight loss process and my writing career, " she told CNN.

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