Abstract：
:Much attention has been given in the literature to the effects of astrophysical events on human and land-based life. However, little has been discussed on the resilience of life itself. Here we instead explore the statistics of events that completely sterilise an Earth-like planet with planet radii in the range 0.5-1.5R ⊕ and temperatures of ∼300 K, eradicating all forms of life. We consider the relative likelihood of complete global sterilisation events from three astrophysical sources - supernovae, gamma-ray bursts, large asteroid impacts, and passing-by stars. To assess such probabilities we consider what cataclysmic event could lead to the annihilation of not just human life, but also extremophiles, through the boiling of all water in Earth's oceans. Surprisingly we find that although human life is somewhat fragile to nearby events, the resilience of Ecdysozoa such as Milnesium tardigradum renders global sterilisation an unlikely event.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Sloan D,Alves Batista R,Loeb Adoi
10.1038/s41598-017-05796-xsubject
Has Abstractpub_date
2017-07-14 00:00:00pages
5419issue
1issn
2045-2322pii
10.1038/s41598-017-05796-xjournal_volume
7pub_type
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