Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Counterintuitive Universe   The major advances in physics have been through counterintuitive
breakthroughs-- ideas that seemed to go against prevailing convictions. In the
twentieth century the Special and General Theory of Relativity and Quantum
Mechanics have provided very good examples of this process. However, twentieth
century physics has led to an impasse, one of the most important unsolved
problems being the unification of gravitation with other interactions. This has
led to another sacred tenet of physics, viz., spacetime as a smooth manifold,
being questioned in latest approaches, be it Quantum Super Strings or other
Quantum Gravity and similar theories. In particular spacetime described by an
underpinning of Planck scale oscillators is investigated.

27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc