Peer review is the driving force of journal development, and reviewers are gatekeepers who ensure that Universe maintains its standards for the high quality of its published papers. Thanks to the cooperation of our reviewers, in 2020, the median time to first decision was 19 days and the median time to publication was 39 days. The editors would like to express their sincere gratitude to the following reviewers for their precious time and dedication, regardless of whether the papers were published:
| Abouelmagd, Elbaz | Lepe, Samuel |
| Abreu, Everton | Lev, F. |
| Acedo, Luis | Li, Shirley Weishi |
| Addazi, Andrea | Li, Xin |
| Agodi, Clementina | Li, Xinzhong |
| Alberti, Tommaso | Li, Yu-Feng |
| Alcolea, Javier | Liegener, Klaus |
| Alexandrovich Zyuzin, Dmitry | Lin, Chia-Min |
| Alexeyev, Stanislav | Lin, Chunshan |
| Altschul, Brett | Lin, Guey-Lin |
| Alvarez-Castillo, David Edwin | Link, Jonathan |
| An, Tao | Liu, Yan |
| Andrew, Keith | Livine, Etera |
| Andrianov, Alexander | Lobato, Ronaldo |
| Andrzejewski, Krzysztof | Lobo, Francisco |
| Anguelova, Lilia | Lobo, Iarley |
| Antonio, Capolupo | Logoteta, Domenico |
| Arbuzov, Andrei | Longo, Michael |
| Ardenghi, Juan Sebastián | Lopez-Eiguren, Asier |
| Aros, Rodrigo | LoSecco, John |
| Arraut, Ivan | Lovell, Mark |
| Arzano, Michele | Lucini, Biagio |
| Asada, Hideki | Lukes-Gerakopoulos, Georgios |
| Ashrafi, Nariman | Lunin, Oleg |
| Astashenok, Artyom | Luongo, Orlando |
| Attems, Maximilian | Maestro, Paolo |
| Balbinot, Roberto | Maharaj, Sunil |
| Ballardini, Mario | Malek, Emanuel |
| Bamba, Kazuharu | Maluf Cavalcante, Roberto |
| Bambi, Cosimo | Maluf, José Wadih |
| Bandos, Igor | Mannarelli, Massimo |
| Banik, Indranil | Marcowith, Alexandre |
| Bao, Ning | Mariani, Camillo |
| Barabash, Alexander | Markvorsen, Steen |
| Barboza, Edésio Miguel | Marochnik, Leonid |
| Barrau, Aurelien | Martín-Albo, Justo |
| Bartelmann, Matthias | Martino, Ivan De |
| Bastianelli, Fiorenzo | Martucci, Matteo |
| Battistelli, Elia Stefano | Marziani, Paola |
| Beccaria, Matteo | Masiello, Antonio |
| Beckwith, Andrew | Matsuno, Ken |
| Beltran Jimenez, Jose | Mazzitelli, Francisco Diego |
| Berezin, Victor | McCarroll, Ronald |
| Bergeron, Herve | McCulloch, Mike |
| Bermudez, David | Meierovich, Boris |
| Berton, Marco | Menendez, Javier |
| Bicknell, Geoffrey | Menezes, Gabriel |
| Biesiada, Marek | Meng, Xin-He |
| Bietenholz, Wolfgang Peter | Mertens, Thomas |
| Bisnovatyi-Kogan, Gennady | Messenger, Chris |
| Blaschke, David | Michel, Florent |
| Bobomurat, Ahmedov | Micol, Benetti |
| Boettcher, Igor | Mielke, Eckehard |
| Bojowald, Martin | Miković, Aleksandar |
| Bolognesi, Stefano | Millington, Peter |
| Bonanno, Alfio | Milton, Kimball |
| Bondarenko, Sergey | Minamitsuji, Masato |
| Boorman, Peter | Minkevich, Albert |
| Bopp, Fritz | Miralles, Juan Antonio |
| Borges, Humberto | Miramonti, Lino |
| Borovsky, Joe | Mizuno, Yosuke |
| Bosso, Pasquale | Modanese, Giovanni |
| Boulanger, Nicolas | Moraes, P. |
| Brack, Andre | Morikawa, Masahiro |
| Brescia, Massimo | Mosquera Cuesta, Herman |
| Brizuela, David | Mostepanenko, Vladimir |
| Bronnikov, Kirill | Moustakidis, Charalampos |
| Bucciantini, Niccol’o | Mukherjee, Suvodip |
| Bulten, Henk Jan | Muñoz, Gerardo |
| Burinskii, Alexander | Nagai, Hiroshi |
| Cai, Yi-Fu | Nagirner, Dmitrij |
| Caiazzo, Ilaria | Nampalliwar, Sourabh |
| Cameron, Robert | Nara, Yasushi |
| Camparo, James | Navarro-Salas, Jose |
| Cao, Zhoujian | Nedkova, Petya |
| Capistrano, Abraao | Nian, Jun |
| Capolupo, Antonio | Nicolas, Chamel |
| Capozziello, Salvatore | Nikolaevich, Frolov Boris |
| Caracciolo, Vincenzo | Nikolic, Hrvoje |
| Casadio, Carolina | Nilsson, Nils Albin |
| Casadio, Roberto | Nishi, Celso |
| Casula, Giuseppe | Nojiri, Shin’ichi |
| Cavalcanti, Rogerio Teixeira | Normann, Ben David |
| Cebrián Guajardo, Susana | Nowakowski, Marek |
| Celada, Mariano | Nozzoli, Francesco |
| Chamoun, N. | Nunes, Rafael |
| CHAN, Man | O’raifeartaigh, Cormac |
| Char, Prasanta | Obukhov, Yuri |
| Cheoun, Myung-Ki | Odintsov, Sergei |
| Chernodub, Maxim | Oikonomou, Vasileios |
| Chervon, Sergei | Okorokov, Vitaly |
| Chiarelli, Piero | Olmo, Gonzalo |
| Chodos, Alan | Otsuka, Masaaki |
| Choudhury, Sayantan | Overduin, James |
| Chu, Ming Chung | Ovgun, Ali |
| Cicoli, Michele | Oyama, Kohichiro |
| Cleaver, Gerald | Pacheva, Svetlana |
| Combrinck, Ludwig | Pagliara, Giuseppe |
| Corasaniti, Pier Stefano | Pajares, Carlos |
| Corda, Christian | Palomares-Ruiz, Sergio |
| Corral, Cristobal | Pan, Jinjin |
| Coughlin, Michael | Papaioannou, Athanasios |
| Cremona, Francesco | Park, Inyong |
| Croft, Rupert | Pasechnik, Roman |
| Cruz Osorio, Alejandro | Passante, Roberto |
| Cunha De Holanda, Pedro | Pavlov, Yu. |
| Cunha, Pedro | Pavón, Diego |
| Dabrowski, Mariusz | Percacci, Roberto |
| Dale, Roberto | Perez, Alejandro |
| Danehkar, Ashkbiz | Pérez-García, M. Ángeles |
| Dasgupta, Arundhati | Perivolaropoulos, Leandros |
| Davidson, Aharon | Perlick, Volker |
| De Felice, Antonio | Peron, Roberto |
| De Leo, Stefano | Petreska, Irina |
| De Martino, Ivan | Petri, Jerome |
| De Napoli, Marzio | Petrov, Albert |
| Debono, Ivan | Pfeifer, Christian |
| Degollado, Juan Carlos | Piattella, Oliver |
| Deng, Xue-Mei | Pignalberi, Alessio |
| Denton, Peter | Platania, Alessia |
| Deppisch, Frank | Polarski, David |
| Deppman, Airton | Polonyi, Janos |
| Di Felice, Valeria | Poonthottathil, Navaneeth |
| Dialektopoulos, Konstantinos | Potekhin, A. |
| Ding, Xuefeng | Pouquet, Annick |
| Dokuchaev, Vyacheslav | Przanowski, Maciej |
| Dolgov, Alexander | Pullin, Jorge |
| Done, Chris | Qian, Y.H. |
| Doro, Michele | Radinschi, Irina |
| Drago, Alessandro | Raduta, Adriana |
| Dunne, Gerald | Rae, Alastair |
| Duong, Minh Quan | Ramirez, Cupatitzio |
| Dymnikova, Irina | Rastgoo, Saeed |
| Edwards, Mark | Ratti, Claudia |
| Edwards, Philip | Redi, Michele |
| Efroimsky, Michael | Ricci, Fulvio |
| El Moumni, Hasan | Riffel, Rogemar |
| Elemér, László | Robbins, Daniel |
| Elizalde, Emilio | Robertson, Hamish |
| Eminov, Pavel | Rocha, Roldão |
| Engel, Jonathan | Rojas, Juan Efrain |
| Erbin, Harold | Romatschke, Paul |
| Escamilla Herrera, Lenin Francisco | Roshchupkin, Sergei |
| Escamilla-Rivera, Celia | Rositsa, Miteva |
| Essén, Hanno | Rosmej, Frank |
| Fabrikant, Ilya | Rotondo, Marcello |
| Fabris, Júlio | Rovelli, Carlo |
| Fabris, Júlio César | Roy, Indrani |
| Fan, Junhui | Rueda, Jorge |
| Faraggi, Alon | Ruggiero, Matteo Luca |
| Fatibene, Lorenzo | Ruiz, Daniel |
| Fedorova, Elena | Saa, Alberto |
| Felix, Karbstein | Saavedra, Joel |
| Fendt, Christian | Sabin, Carlos |
| Feoli, Antonio | Sagun, Violetta |
| Ferrer, Efrain | Saharian (Saharyan), Aram Azati |
| Figueiredo, Cosme Alexandre | Said, Jackson Levi |
| Fil’chenkov, Michael | Saida, Hiromi |
| Fomin, Igor Vladimirovich | Salasnich, Luca |
| Foschini, Luigi | Salewski, Mirko |
| Foster, Adam | Salucci, Paolo |
| Frassino, Antonia | Samtleben, Henning |
| Frey, Sandor | Sanchez, Miguel |
| Gabuzda, Denise | Sanchez, Norma |
| Gal’tsov, Dmiitry | Santopinto, Elena |
| Gao, Changjun | Santos, J |
| Gariazzo, Stefano | Satunin, Petr |
| Garzelli, Maria Vittoria | Savelova, Elena |
| Gasperini, Maurizio | Savvidy, George |
| Gates, James | Sazhina, Olga |
| Gavrilov, Sergey | Scarr, Tzvi |
| Gazeau, Jean-Pierre | Schmidt, Michael |
| Ge, Xianhui | Schreck, Marco |
| Geng, Chao-Qiang | Sebastian Koivisto, Tomi |
| Georgiev, Danko | Sebastiani, Lorenzo |
| Gergely, László | Shalyt-Margolin, Alexander |
| Gharibyan, Hrant | Shapiro, Ilya |
| Ghizzo, Alain | Sharma, Ram Krishan |
| Giaccari, Stefano | Silvi, Pietro |
| Giambo, Roberto | Simkovic, Fedor |
| Giannoni, Fabio | Singh, Parampreet |
| Gibbons, Gary | Singleton, Douglas |
| Gitman, Dmitry | Sitarek, Julian |
| Giulini, Domenico | Smith, Michael |
| Giunti, Carlo | Smolić, Ivica |
| Golterman, Maarten | Soda, Jiro |
| Gott. III, Richard | Solà Peracaula, Joan |
| Gourgouliatos, Konstantinos | Soma, Arun |
| Granemann Souza, Everton | Spencer, Edmund |
| Graziani, Luca | Spyrou, Nikolaos |
| Gregoris, Daniele | Staicova, Denitsa |
| Grib, A. | Starobinsky, Alexei |
| Groote, Stefan | Stavrinos, Panayiotis |
| Gubitosi, Giulia | Stecker, Floyd |
| Guendelman, Eduardo | Steene, Griet |
| Gulminelli, Francesca | Steinheimer, Jan |
| Guo, Feng-Kun | Stoica, Sabin |
| Gusakov, Mikhail | Stojkovic, Dejan |
| Guzmán, María José | Strakovsky, Igor |
| Gyulchev, Galin | Struyve, Ward |
| Haba, Zbignew | Sun, Jiarui |
| Hadley, Mark | Sushkov, Sergei |
| Haggard, Hal | Sylos Labini, Francesco |
| Hamber, Herbert | Tada, Yuichiro |
| Han, Wenbiao | Teklu, Berihu |
| Harko, T. | Tolley, Andrew |
| Helayel-Neto, J. A. | Toroš, Marko |
| Henry, Richard Conn | Torrieri, Giorgio |
| Herdeiro, Carlos | Tsukamoto, Naoki |
| Holdom, Bob | Tsupko, Oleg |
| Hussain, Ibrar | Tumurtushaa, Gansukh |
| Ingold, Gert-Ludwig | Turko, Ludwik |
| Inui, Norio | Ulhoa, Sérgio Costa |
| Iorio, Lorenzo | Vacca, Gian Paolo |
| Isenberg, Jim | Vagnozzi, Sunny |
| Ivanov, Igor | Van Beveren, Laurens Willems |
| Javaloyes, Miguel Ángel | Van Holten, J.W. |
| Jentschura, Ulrich | Vancea, Ion Vasile |
| Jeong, Donghui | Vanhove, Pierre |
| Jetzer, Philippe | Vaskonen, Ville |
| Jevicki, Antal | Velhinho, José |
| Jipa, Alexandru | Velten, Hermano |
| Joung, Euihun | Veras, Dimitri |
| Kaempfer, Burkhard | Vereshchagin, Gregory |
| Kalantonis, Vassilis | Vergara, José David |
| Kamenshchik, Alexander | Viaggiu, Stefano |
| Karam, Alexandros | Vignolo, Stefano |
| Kassandrov, Vladimir | Villaescusa-Navarro, Francisco |
| Katsuragawa, Taishi | Vissani, Francesco |
| Kearns, Ed | Vogt, Ramona |
| Kereszturi, Akos | Voicu, Nicoleta |
| Ketov, Sergei | Volkas, Raymond Robert |
| Khlopov, Maxim | Voyatzis, George |
| Khurshudyan, Martiros | Waldron, Abbey |
| Kidonakis, Nikolaos | Wang, Anzhong |
| Kim, Yeongduk | Weber, Fridolin |
| Kimura, Shigeo | Wei, Hanyu |
| Kirillov, Alexander | Wei, Shao-Wen |
| Kisslinger, Leonard | Wen, Meng |
| Koibuchi, Hiroshi | Wietfeldt, Fred |
| Koldobskiy, Sergey | Wiggins, Brandon |
| Kološ, Martin | Wlodarczyk, Zbigniew |
| Konoplya, Roman | Wu, Qiang |
| Kontar, Eduard | Wu, Shuoxing |
| Kopeikin, Sergei | Xie, Fu-Guo |
| Koshelev, Alexei | Xu, Jun |
| Kotanjyan, Anna | Xu, Renxin |
| Krishnan, Badri | Xu, Rui |
| Król, Jerzy | Yakovlev, Dmitry |
| Kullie, Ossama | Yang, Run-Qiu |
| Kuroyanagi, Sachiko | Yoshida, Shin’ichirou |
| Kwek, Leong Chuan | Yuan, Tianlu |
| Kyutoku, Koutarou | Zabrodin, Evgeny |
| L’Huillier, Benjamin | Zaninetti, Lorenzo |
| Lattimer, Jim | Zaripov, Farkhat |
| Lazarovici, Dustin | Zhang, Xiangdong |
| Lebiedowicz, Piotr | Zhou, Shun |
| Lee, Chungchi | Zhuk, Alexander |
| Lee, Chung-Chi | Ziaeepour, Houri |
| Lee, Eun Ah | Zilhao, Miguel |
| Leonhardt, Ulf | Zou, Yuanchuan |
| Leontaris, George | Zuzel, Grzegorz |
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