Siarhei Besarab[a] is a Belarusian chemist,[1][2] civil activist,[3] and science communicator[4] known for his contributions to popularizing science in the fields of radioactivity, nuclear safety, and environmental protection. As one of the few voices drawing[5][6] public attention to political repression within the Belarusian scientific and academic community, Besarab faced professional dismissal and a ban from public institutions following the 2020 Belarusian protests due to his political stance. He continued his advocacy through public science journalism, critically analyzing the Astravets Nuclear Power Plant’s safety systems and addressing the deployment of Russian nuclear weapons in Belarus. His activism led to political persecution by the Belarusian authorities, with charges from the Belarusian KGB forcing him to flee to the European Union in June 2023, where he remains active in both his scientific and civic roles.
Siarhei Besarab was born in 1984 in the city of Novogrudok in the Grodno Region of western Belarus.[7] He graduated with honors from Secondary School No. 3 in Novogrudok, where he won several awards at regional and national chemistry olympiads during his school years.[8] While in school, Besarab was chosen for a special honor: he got to wear the academic gown of Barys Kit, a famous Belarusian-American rocket scientist. Kit donated his gown to the local museum to inspire students. This tradition recognizes top students for their achievements and connects them to Kit’s scientific legacy.[9]
He earned his master's degree in chemistry at the University of National Academy of Sciences of Belarus (NASB). His master’s research was supervised by Alexander Tretyak, a renowned specialist in glass chemistry and functional glass materials.[11] Following his master’s studies, Besarab completed his PhD in surface science under the guidance of academician Vladimir Komarov at the Institute of General and Inorganic Chemistry at NASB.[3] Komarov is recognized as a leading Belarusian chemist and founder of the national school of adsorption science.[12]
During his secondary school and university years, Besarab developed an interest in meteoritics and meteorite hunting. He worked as an analytical chemist in a team involved in commercial meteorite search expeditions, where he was responsible for identifying recovered materials. [13][14] This early professional experience contributed to his scientific training and practical skills.
Since 2010, Besarab has worked as a research scientist in the Laboratory of Adsorbents and Adsorption Processes at the Institute of General and Inorganic Chemistry at NASB, and focusing on inorganic porous materials, effective adsorbents, and new catalysts.[15] Holder of 12 patents,[2] his research ranked[16] among the top 100 in Belarusian fundamental and applied sciences from 2011 to 2015 and earned[2] him two prizes in the Republican Scientific Research Competition (2009, 2011). In 2016, he won the Belarusian segment of the Skolkovo Startup Tour for a mercury fume purification device[17] and contributed to developing polymer hydrogels[18] and additive technologies in cardiac surgery as a scientific advisor at the Republican Scientific and Practical Center of Pediatric Surgery. Additionally, he organized Belarus's first scientific hackathon, SciHackathon, in 2017.[19][20]
Logo of LAB-66, a science blog managed by Siarhei Besarab
Siarhei Besarab has made significant contributions to science communication as a journalist and educator.[21] Since 2019, he has managed LAB-66,[22] a popular Telegram science blog with over 19,000[23] readers, focusing on chemistry, civil safety, and radiological protection. The blog's analytical articles have been widely reprinted in Belarusian and Ukrainian media, and its content has supported investigative journalism, such as that by the OSINT project Belarusian Hajun.
As a scientist actively involved in public policy discourse, Siarhei Besarab collaborates with several independent Belarusian investigative initiatives. Notably, he has contributed to the Belarusian Investigative Center (BIC), providing scientific analysis and expert commentary in investigations related to environmental violations, misuse of hazardous substances, and industrial activities linked to corruption or state repression. His work has supported efforts to expose alleged crimes and abuses associated with the Lukashenko regime.[27][irrelevant citation]
Siarhei Besarab has played a prominent role in advocating for civil rights and academic freedom in Belarus. In 2020, he issued a scientific rebuttal to accusations against civil activist Stsiapan Latypau, debunking claims of a plot to poison law enforcement with agricultural chemicals.[29] He also contributed to an Appeal by Belarusian scientists condemning state violence following the contested presidential election, actions that led to his dismissal from the Institute of General and Inorganic Chemistry and a professional ban.[30] His inclusion in the list of repressed Belarusian scientists prompted the scientific community to publish The Scientists’ Open Letter Against Repressions, signed by over 800 academics.[31]
In response to ongoing repression, Besarab co-founded the Belarusian Scientific Solidarity Fund[32] to support persecuted scholars. He further opposed the Russian invasion of Ukraine by publishing an open letter on behalf of the Belarusian scientific community,[33][34][35] despite backlash from the NASB.[36] As part of the Until All Are Free campaign,[37] he became an advocate[38] for political prisoner Artsiom Bayarski, a chemistry student targeted for his involvement in post-election protests.
Besarab has consistently highlighted issues in Belarusian science, such as censorship, lack of academic freedom,[39] and opaque funding practices. His data-driven initiatives include mapping the repression of Belarusian citizens[40] and scientists, producing analyses like the "map of Belarusian extremism"[41] and profiles of repressed academics.[39] Through his activism, Besarab remains a vocal proponent of transparency and reform in science policy and education.[42][43][44]
Besarab, widely recognized as a scientific journalist specializing in radioactivity, dosimetry, nuclear plant safety, and the environmental impact of nuclear waste,[45] gained prominence among Russian-speaking readers for his critical analyses of radiation safety. His reputation as a technical expert became particularly notable after the launch of the Astravets Nuclear Power Plant, where he emerged as one of the leading public critics of the station's radiation safety systems.[46][47][48][49][50]
In spring 2023, amidst heightened geopolitical tensions, Belarusian President Alexander Lukashenko announced plans to bring Russian tactical nuclear weapons into Belarus. Besarab responded by publishing detailed descriptions[51] of potential storage sites for these weapons on his blog and engaging with independent Belarusian media to discuss the associated risks. This activity placed him in direct conflict with Belarusian authorities, who subsequently labeled all content from his science blog as extremist material.[52][53]
Facing mounting pressure, Besarab became the target of criminal charges for allegedly causing harm to the state.[54][55] The Belarusian KGB threatened him with imprisonment, prompting his decision to flee the country and seek political asylum within the European Union to ensure his safety.[56] In addition to legal persecution, Besarab faced an orchestrated smear campaign in state-run media, including attacks by propagandists from prominent outlets such as Belarus Today.[57]
^"Бесараб: «Беларускім прадпрыемствам грошы вельмі патрэбныя, і ў цяперашніх варунках для іх «вайна — маці родная»" [Besarab: Belarusian enterprises need moneys very much, and in the current situation for them 'war is a mother-in-law']. gazetaby.com (in Belarusian). Archived from the original on 2024-05-28. Retrieved 2024-05-28. Журналіст абмеркаваў з навукоўцам і самым вядомым беларускім навукова-тэхнічным блогерам Сяргеем Бесарабам перспектывы і сутнасць беларуска-расійскага супрацоўніцтва ў авіябудаўніцтве [The journalist discussed outlook for the future of Belarusian-Russian cooperation in aviation with Siarhei Besarab, a scientist and the most well-known Belarusian science and technology blogger]
^"Таленты побач" [Talents Among Us]. Novae Zhytstsio (in Belarusian). No. 71 (8256). Novogrudok. 2001. p. 3.
^"114 гадоў з дня нараджэння Барыса Кіта" [Celebrating 114 Years Since the Birth of Barys Kit, Belarusian-American Rocket Pioneer]. Рацыя (in Belarusian). 2024-04-06. Archived from the original on 2024-04-06. Retrieved 2025-07-07. Сяргей Бесараб – адзін з тых вучняў Наваградка, якому за поспехі ў вучобе пашчасціла ганарова насіць мантыю Барыса Кіта, якую вучоны ў свой час перадаў на вечнае захаванне ў Наваградскі гісторыка-краязнаўчы музей. [Siarhei Besarab was one of the few high school students in Novogrudok who received a special honor for academic excellence: he was chosen to wear the academic gown of Barys Kit, a renowned Belarusian-American rocket scientist. Kit donated his gown to the local history museum so that it could be awarded to outstanding students as a way to inspire them and connect them to his scientific legacy.]
^"«Гэта можа выклікаць рак». Навуковец б'е трывогу адносна таго, што ў Беларусі пачалі апраменьваць прадукты радыяцыяй" [‘This Could Cause Cancer’: Scientist Raises Alarm Over Radiation-Treated Food in Belarus]. Наша Ніва (in Belarusian). 2023-03-15. Retrieved 2025-06-30. Сяргей Бесараб - выпускнік кафедры радыяцыйнай хіміі БДУ, дзе ён займаўся менавіта свабоднымі радыкаламі, якія ўзнікаюць пад уздзеяннем радыяцыі. Яго навуковы кіраўнік, прафесар Алег Шадыра, лічыўся найлепшым спецыялістам у даследаванні ўплыву радыяцыі. [Siarhei Besarab is a graduate of the Department of Radiation Chemistry at Belarusian State University, where he specialized in studying free radicals generated by radiation exposure. His academic advisor, Professor Oleg Shadyro, is recognized as a leading expert in the study of radiation effects.]
^"В Канаде рассказали о прорывной разработке, которую в Беларуси зарубили много лет назад. Как такое происходит, объяснил автор проекта" [Canada Unveils Breakthrough Innovation Rejected Years Ago in Belarus — Project's Creator Explains Why It Happens]. Зеркало (in Russian). 2024-02-28. Archived from the original on 2024-02-28. Retrieved 2025-06-30. Руководитель моей магистерской программы - это Александр Николаевич Третьяк. Уникальный, если не единственный в Беларуси специалист по химии стекла и хрусталя, который долгое время пытался привлечь внимание к необходимости разработки в Беларуси собственных функциональных стекол [My master's program was led by Alexander Nikolaevich Tretyak — a unique, and perhaps the only, expert in glass and crystal chemistry in Belarus. For years, he worked to draw attention to the urgent need for developing Belarus’s own functional glass materials.]
^"Разведчык з Кнігі вялікіх хімікаў" [A Pioneer from the Book of Great Chemists]. «Настаўніцкая газета» (in Russian). 2016-03-03. Archived from the original on 2021-06-20. Retrieved 2025-06-30.
^Kilʹchevskiĭ, A. V.; Natsyi︠a︡nalʹnai︠a︡ akadėmii︠a︡ navuk Belarusi, eds. (2016). Katalog top-100 rezulʹtatov fundamentalʹnykh i prikladnykh issledovaniĭ NAN Belarusi [Catalog of TOP-100 Results of Fundamental and Applied Research of NAS of Belarus for 2011-2015] (in Russian). Minsk: Belnavuka. ISBN978-985-08-2009-9.
^"Сколково продвигает идеи молодых" [Skolkovo promotes the ideas of the young scientists]. Навука (in Russian). 2587 (16): 2. 2016.
^"Наука в ударе" [Science is on fire]. www.sb.by (in Russian). СБ-Беларусь. 2016-09-21. Retrieved 2024-04-23.
^Кот, Юлія (2024). "Бесараб: «Беларускім прадпрыемствам грошы вельмі патрэбныя, і ў цяперашніх варунках для іх «вайна — маці родная»" [Belarusian Firms Rely on War Profits to Survive, Expert Says]. gazetaby.com (in Belarusian). Салідарнасць (газета). Archived from the original on 2025-07-02. Мы абмеркавалі з навукоўцам і самым вядомым беларускім навукова-тэхнічным блогерам Сяргеем Бесарабам перспектывы і сутнасць беларуска-расійскага супрацоўніцтва ў авіябудаўніцтве [We spoke with Siarhei Besarab, a leading Belarusian science and technology blogger and researcher, about the prospects and realities of Belarus-Russia cooperation in the aviation industry.]
^Constanta, Human (2023-07-18). "Обзор борьбы с «экстремизмом» в Беларуси за апрель-июнь 2023" [Overview of Combating "Extremism" in Belarus (April–June 2023)]. Human Constanta (in Russian). Retrieved 2024-04-23. [In his papers, chemist Siarhei Besarab mostly steered clear of politics, but he did discuss the Astravets Nuclear Power Plant and spoke to independent media, which got him in trouble.]
^"Набыў у Менску радыяактыўныя пацеркі. Хімік расказвае, як засцерагчыся ад выпраменьвання дома" [A chemist explains how to keep yourself safe from radiation at home]. Зелёный портал (in Russian). Retrieved 2024-04-30. [Siarhei Besarab, a radiation chemist, scientific blogger, and former Academy of Sciences employee, now lives in the European Union. He's facing charges from Lukashenko's authorities that could lead to 25 years in prison]
^Муковозчик, Андрей (2023-08-28). "Путаные мысли приводят к путаной жизни" [Confused thoughts lead to a confused life]. www.sb.by (in Russian). Retrieved 2024-04-23.