Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Short note on the Sirenia disappearance from the Euro-North African
  realm during the Cenozoic: a link between climate and Supernovae?   Sirenia are marine mammals that colonized the European shores up to 2.7 Ma.
Their biodiversity evolution follows the climate evolution of the Cenozoic.
However, several climate events, as well as the global climate trend of this
Era are still struggling to be understood. When considering only Earth
processes, the climate evolution of the Cenozoic is hard to understand. If the
galactic environment is taken into account, some of these climate events, as
well as the global climate trend, became more easily understood. The Milky Way,
through Supernovae, may bring some answers to why Cenozoic climate had this
evolution. With the assumption that SN can induced changes in Earth climate in
long time scales, Sirenia disappearance from Europe would be a side effect of
this process.

30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg