1. Predictions of our model and especially fittings with measured data indicate a possible presence of an other universe in our known one. In our previous publication we have reported about our finding that possibly a smaller twin Universe was born in the Big Bang and passing through our Universe it left to the multiverse space. Taking this seriously we can start describe such a double event and try to give the equations, possible solutions and effects which can be predicted. We will describe the case on the base of a traditional picture. 2. The system of coupled equations describing the double universe case H_1^2≈ V_1 (ϕ_1 )/3〖m_p〗^2+V_int (t,L,ϱ_i,T_i,ϕ_i,…) 3H_1 ϕ ̇_1≈-V_1^' (ϕ_1 ) H_2^2≈V_2 (ϕ_2 )/3〖m_p〗^2+V_int (t,L,ϱ_i,T,ϕ_i,…) 3H_2 ϕ ̇_2≈-V_2^' (ϕ_2 ) L^2≈V(ϕ)/3〖m_p〗^2 3Lϕ ̇≈-V^' (ϕ) where L – measure of the overlap of U1 and U2, φ – inflaton in multiverse, V – potential in multiverse 3. Analysis Our EQP/DWT model [4,5,6,7,8]provides in case of the universe the measurable baryonic, dark matter, total matter and dark energy rates. These deviate significantly from the measurable ones by WMAP and Planck and rise the possibility of a double Big Bang. Supposing this the prediction fit well for the recently measurable ratios. On this base we can suppose that an other (with about 1/3 expected total energy) universe has been created probably yet in the epoch of inflation [2,3]. Such a double event can have numerous important, measurable outcomes. 4. Important experimental fields The measurements of WMAP yielded power spectra and temperature fluctuation map. The Planck Mission similar measurements provided more characteristic asymmetries for the dark matter content of the measured sky. The Eridanus Cold spot and super Void investigations in the background of a measurements, the Quark Gluon plasma Heavy ion reactions [1] and also the double Black Hole measurements are very important related fields. Double galaxies and galaxy collisions can provide important knowledge [9,10,11,12]. 5. Conclusions Many interesting questions arise and many interesting predictions can be made on the base of this model and scenario. In case of two universes their dark matter content and dark matter interactions can be important. 6. References: [1] Z. Arvay at al., Zeitschrift für Physik. A 348, 201-210 (1994) [2] Z. Árvay, About the dark matter, The XXVII International Conference on Neutrino Physics and Astrophysics (Neutrino 2016), London, 4 - 9 July 2016, abstract submitted [3] Z. Árvay, Prediction of the existence of an other Universe which may correlate with WMAP data and supported by Planck measurements, The XXVII International Conference on Neutrino Physics and Astrophysics (Neutrino 2016), London, 4 - 9 July 2016, abstract submitted [4] Z. Árvay and V. Árvay, Acceleration of expansion and neutrino momentum relocation, Abstract, submitted to Dark Matter UCLA 2012 conference, 2012 [5] Z. Árvay and V. Árvay, Structures and oscillations between visible and dark matter in the framework of the Dual World Theory model, EuCost Brussels and SBC Cluster, Hungary, Abstract, submitted to Dark Matter UCLA 2012 conference, 2012 [6] Z. Árvay and V. Árvay, Extended Einstein Rosen Bridge Quasars are Predicted, presented at 9th International Conference: Identification of Dark Matter 2012, July 23-27 Chicago, USA [7] Z. Árvay, V. Árvay, 4th NASA Fermi Symposium, 28 oct.- 2 nov. 2012, Monterey, CA [8] Z. Árvay, About Dark Universe and Origin of Life, 20 March, 2013 in Proceedings Poster Dropbox, 4th NASA Fermi Symposium, 28 oct.- 2 nov. 2012, Monterey, CA, USA. [9]Bennett, C.L.; Larson, L.; Weiland, J.L.; Jarosk, N.; et al. (2013). "Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results". The Astrophysical Journal Supplement 208 (2) [10] Planck Collaboration (2013). "Planck 2013 results. XVI. Cosmological parameters". arXiv:1303.5076 [11] Planck 2015 results. XVI. Isotropy and statistics of the CMB, Astronomy & Astrophysics manuscript no. planck_2015_iands, June 5, 2015 [12] I. Szapudi et al., Detection of a supervoid aligned with the cold spot of the cosmic microwave background, Monthly Notices of the Royal Astronomical Societymnras.oxfordjournals.org, MNRAS (June 11, 2015) 450 (1): 288-294. doi: 10.1093/mnras/stv488 First published online April 19, 2015