PIRSA:20010091

Towards inclusion of biology in cosmology

Cortes, M. (2020). Towards inclusion of biology in cosmology. Perimeter Institute. https://pirsa.org/20010091

Cortes, Marina. Towards inclusion of biology in cosmology. Perimeter Institute, Jan. 28, 2020, https://pirsa.org/20010091 

          @misc{ pirsa_PIRSA:20010091,
            doi = {10.48660/20010091},
            url = {https://pirsa.org/20010091},
            author = {Cortes, Marina},
            keywords = {Cosmology},
            language = {en},
            title = {Towards inclusion of biology in cosmology},
            publisher = {Perimeter Institute},
            year = {2020},
            month = {jan},
            note = {PIRSA:20010091 see, \url{https://pirsa.org}}
          }

Marina Cortes

Institute for Astrophysics and Space Sciences

Talk number
PIRSA:20010091
Collection
Talk Type
Subject
Abstract

Cosmologists wish to explain how our universe, in all its complexity, could ever have come about. This is the problem of initial conditions and the first step towards its solution is the assessment of the universe’s entropy today. It is widely agreed upon that the entropy of vacuum energy, given by the Bekenstein bound, makes up the bulk of the current entropy budget, dominating over that of gravity and over thermal motions of the cosmic radiation background.

Have we counted all significant contributions to the entropy inventory? There is one number which we have not considered: the number of degrees of freedom in our vibrant, complex biosphere. What is the entropy of life? Is it sizeable enough to need to be accounted for at the Big Bang, or negligible compared to vacuum entropy?