Annals of the Academy of Romanian Scientists

Series on Agriculture, Silviculture and Veterinary Medicine

Volume 15, Number 1/2026

ISSN 2344-2085

66

ADVANCING EUROPEAN PLANT KARYOLOGY:

THE 20^th-CENTURY CONTRIBUTIONS OF VICTOR GHIMPU

Gallia BUTNARU¹

Abstract. The research and teaching activity of Prof. Dr. Victor Ghimpu was highly

synchronized with the major scientific trends in leading European centers, notably in

France, Germany, the United Kingdom, and Russia. In an era when classical genetics

merged with the microscopic analysis of cells and nuclei, Dr. Ghimpu placed Romanian

karyology on the global scientific map through pioneering studies on chromosome and

satellite structures. However, in countries later trapped behind the Iron Curtain, such as

Romania, cytogenetics had to be rediscovered following the destructive period of

Lysenkoism (ca. 1948–1964). The turning point for Eastern Europe's return to classical

genetics occurred at the landmark International Mendel Memorial Symposium held in

Brno in 1965. This event marked the rehabilitation of ''Miciurinism'' genetics in the

region, attempting to recover nearly half a century of lost priorities and stalled progress

in karyological research. Lysenkoism was officially abandoned in the USSR and its

satellites shortly after 1964. Claiming it lasted until 1988 is factually incorrect; by the

late 1950s and 1960s, Romanian agricultural universities were already teaching classical

genetics under the guise of 'creative Darwinism' [23], as a masked way to educate

students.

Keywords: karyology; cytogenetic progress; Europe; Romania; Victor Ghimpu's work;

20th century.

DOI

10.56082/annalsarsciagr.2026.1.66

¹Prof. emeritus; dr.h.c. Senior Researcher, University of Life Sciences of Timișoara, Timișoara,

România, Department of Genetics, Full member of the Romanian Academy of Scientists; (e-mail:

galliab@yahoo.com ).

Advancing European Plant Karyology:

the 20^th-Century Contributions of Victor Ghimpu

67

1.Introduction

Karyology, the field that studies the number, morphology, and behaviour of

chromosomes in organisms, has played a decisive role in understanding genetic

diversity, speciation in plants and animals, as well as genetic disorders [41, 51, 60,

64, 66, 69]. Building upon Rudolf Virchow's (1821-1902) cell theory principle

that 'all cells come from pre-existing cells,' Theodor Boveri (1862–1915) and

Walter Sutton (1877–1916) conducted cytogenetic studies to develop the

chromosome theory of inheritance. In 1902 and 1903, respectively, they

independently demonstrated that chromosome behaviour during meiosis explains

the physical basis of Mendelian heredity [45].

In 1910, Thomas Hunt Morgan (1866–1945) confirmed this theory by

demonstrating the linear arrangement of linked genes on chromosomes [52].

The 20th century was subsequently shaped by groundbreaking advances in

cytogenetics. Notably, Nettie Stevens (1861–1912) identified sex chromosomes

and described the mechanism of sex determination in 1905 [3], while Jérôme

Lejeune (1926–1994) discovered the chromosomal basis of human genetic

disorders in 1959 [43, 69].

The structural and functional organization of cellular organelles, elucidated by

George Emil Palade (1912-2008), Albert Claude (1898-1983), and Christian de

Duve (1917-2013), fundamentally advanced cellular biology, earning them the

Nobel Prize in Physiology or Medicine in 1974 [8]. Concurrently, the impact of

transposable elements, discovered by Barbara McClintock (1902-1992) in maize

in 1950, was later reassessed as a key mechanism for genetic exchange and

regulation between chromosomes, leading to her Nobel Prize in 1983 [49, 26, 61].

The discovery of telomeres and telomerase by Elizabeth Blackburn, along with

Titia de Lange's subsequent research on telomeric protection, fully elucidated the

mechanisms underlying chromosome stability [12, 21].

In Romania, karyology experienced significant development during the second

half of the 20th century. This progress was driven by the contributions of

prominent geneticists, such as Olga Săvulescu (1914–1969), Natalia Saru (1905–

1975), and Maria Neagu (1921–1985), alongside the influential research group at

the Timișoara Agronomic Institute (IAT) under the leadership of Prof. Dr. Iulian

Drăcea (1922–1980) [23, 67, 65, 29, 57, 58]. The research school at the Timișoara

Agronomic Institute was inspired by the cytological studies of V. Ghimpu and

later continued by Dr. Maria Neagu and Dr. Gallia Butnaru. Prof. Dr. Iulian

Drăcea holds the distinct merit of protecting and supporting this research at a time

when genetic and cytogenetic studies were ideologically prohibited during the

1950s and 1960s.

Following decades of sporadic cytogenetic research, the recent emergence of

advanced staining and molecular techniques has revitalized the field of karyology

[60].

68

Gallia Butnaru

This article traces the key evolutionary stages of plant karyology in Europe and

Romania, highlighting the scientific and educational contributions of Prof. Dr.

Victor Ghimpu, a pioneer of modern cytological research in the country.

2. Materials and Methods

This study employs a qualitative, retrospective historical-agronomic research

design. The primary objective is to reconstruct and analyze the scientific

contributions of Victor Ghimpu to the fields of plant cytogenetics. To ensure the

rigor of data a multi-methodological approach was implemented, combining

archival document analysis, comprehensive literature reviews, and oral history

methodologies.

The core foundational data for this research was retrieved from the physical

archives preserved at the Department of Genetics within King Mihai I University

of Life Sciences from Timisoara. The analyzed primary materials include:

Original interwar monographs, scientific bulletins, and laboratory registers

authored by Victor Ghimpu between the 1920s and 1950s. Institutional

administrative records, course curricula, and historical registers detailing the

evolution of agricultural sciences within the university's historiography.

3. Results and Discussions

Key Pioneers in Karyology:

While Walther Flemming (1843–1905) is widely recognized as the 'father' of

cytogenetics and karyology, other contemporaries made vital contributions to the

field; notably, Wilhelm Waldeyer (1841–1923) and Eduard Strasburger (1844–

1912) extensively studied plant cell division throughout the 1870s and 1880s.[13,

28, 44]. Furthermore, Eduard Strasburger coined essential biological terms such

as cytoplasm and nucleoplasm. He also established one of the modern laws of

plant cytology, demonstrating that 'new cell nuclei can arise only from the

division of pre-existing nuclei′ [10].

In the early 1900s, Theodor Boveri (1862–1915) and Walter Sutton (1877–1916)

independently proposed the chromosomal theory of inheritance. Their

foundational work established that chromosomes serve as the physical vehicles for

genetic transmission, linking cellular behavior directly to Mendelian laws.

Formally recognized as the Boveri–Sutton chromosome theory, this conceptual

breakthrough laid the cornerstone for modern cytogenetics [53, 46, 70, 47, 59]. A

highly significant contribution to modern biology was the theory demonstrating

that Mendelian laws of inheritance apply to chromosomes at the cellular level

across all living organisms [19].

Thomas Hunt Morgan (1866–1945) was educated at the Agricultural and

Advancing European Plant Karyology:

the 20^th-Century Contributions of Victor Ghimpu

69

Mechanical College of Kentucky (renamed the University of Kentucky),

developing into a pioneering evolutionary biologist and geneticist. Morgan

demonstrated that genes are linearly arranged on chromosomes, providing the

physical and mechanical basis of heredity. His groundbreaking work formed the

foundation of modern genetics by experimentally proving the chromosome theory

of inheritance through the demonstration of genetic linkage and recombination in

Drosophila melanogaster (L). Furthermore, Morgan significantly advanced

Darwinism, famously noting that 'evolutionism could not progress without a

correct theory of genetics.' For these discoveries elucidating the role of

chromosomes in heredity, he was awarded the Nobel Prize in Physiology or

Medicine in 1933. His legacy spurred widespread cytogenetic research, which

ultimately drove enormous progress in the study of speciation [29, 27, 9].

In contrast to the static model of the chromosome theory and the fixed, linear

arrangement of genes, Barbara McClintock's (1902–1992) observations provided

revolutionary - though initially vehemently contested - evidence that genetic

elements could change positions within the genome. Her work introduced the

concepts of mobile genetic elements (transposons) and the breakage-fusion-bridge

cycle. The broader significance of McClintock's discoveries became fully

apparent in the 1960s, following François Jacob and Jacques Monod's description

of genetic regulation in bacteria - a concept McClintock had already demonstrated

in 1951 through the Activator/Dissociation (Ac/Ds) system in maize. In

recognition of her visionary research, she was awarded the Nobel Prize in

Physiology or Medicine in 1983. Additionally, 'The McClintock Prize' was

established in 2004 to honor outstanding contributions to plant genetics [26, 25,

50, 7].

Last but not least, Elizabeth Helen Blackburn (b. 1948) discovered telomerase, the

enzyme responsible for synthesizing and maintaining telomeres—the protective

caps at the ends of chromosomes that play a vital role in preserving genomic

integrity. For her pioneering work, she was awarded the Nobel Prize in

Physiology or Medicine in 2009, sharing the honour with Carol W. Greider and

Jack W. Szostak [12].

The Scientific and Educational Legacy of Victor Ghimpu (1920–1950)

The academic contributions of Romanian agronomist, cytologist, and university

professor Dr. Victor Ghimpu (1896–1952) between 1920 and 1950 represent a

cornerstone of applied plant cytogenetics in Romania. He distinguished himself as

an exceptional karyologist and phytopathologist, focusing on the microscopic

analysis of chromosome numbers, morphology, and stability within Medicago,

Acacia, Hordeum, and other cultivated angiosperm species [37, 63].

Evaluating his legacy raises the question of whether Victor Ghimpu should be

classified primarily as a plant karyologist or a phytopathologist. His major

70

Gallia Butnaru

contributions were balanced almost equally between these two domains:

fundamental karyological research (focusing on genetics and chromosome

structure) and applied phytopathology (dedicated to crop protection). Ultimately,

a fair assessment recognizes him as a leading pioneer and one of the most

prominent figures of karyology in Romania.

His research and teaching activities were closely synchronized with contemporary

scientific breakthroughs in leading European centres across France, Germany, the

United Kingdom, and Russia. In an era when classical genetics was merging with

microscopic cell analysis, Dr. Victor Ghimpu placed Romanian research on the

international stage through his pioneering studies on plant chromosome structures.

His enduring impact on the academic community is reflected by the University of

Life Sciences in Timisoara, which honoured his memory by naming the Second

National Genetics and Breeding Conference after him in 2025.

His life and scientific achievements are well-documented across major historical

and academic publications, including Noesis: Travaux du Comité Roumain

d'Histoire et de Philosophie des Sciences [1], Studies and Communications on the

History of Science [2], and the Encyclopedia of Great Personalities in Romanian

History. He is also featured in the Dictionary of the Members of the Romanian

Academy of Sciences (now AOSR), an institution where he actively worked.

Further biographical details can be found in Iulian Viorel Peștean’s Great

Romanian Agronomists [62]. In addition to his academic roles, Dr. Ghimpu

applied his expertise within the Autonomous Directorate of State Monopolies

starting in 1936.

Victor Ghimpu's Specific Contributions to Karyology

Victor Ghimpu distinguished himself as an exceptional karyologist, focusing on

the microscopic analysis of chromosome morphology, stability, and particularly

SAT chromosomes (satellite chromosomes) [54]. As a pioneer in the karyology of

economically important agricultural genera, his foundational research was

published extensively in France and Romania.

For the genus Medicago alone, Ghimpu determined the chromosome numbers for

34% of its 93 species, establishing scientific priority for 27% of the total taxa

(Fig. 1) [31]. His datasets were so precise that they were fully integrated into the

authoritative Chromosome Numbers of Flowering Plants world atlas, edited by

Fedorov and compiled by Bolkhovskikh, Grif, Matvejeva, and Zakharyeva [14].

The Chromosome Satellite Theory

During the 1930s, before electron microscopy was introduced to biological

laboratories, visualizing secondary constrictions and chromosome satellites-small

chromatin masses attached to the main chromosome body by a fine filament-

posed a major technical challenge. The microscopic methodology developed by

Advancing European Plant Karyology:

the 20^th-Century Contributions of Victor Ghimpu

71

Victor Ghimpu for his pioneering karyological studies during that decade relied

on refining differential chemical fixation and selective nucleic acid staining

techniques. Utilizing bright field light microscopy with oil immersion, he

achieved magnifications of up to 1,000 to 1,500 times, making his detailed

chromosomal observations possible (Fig. 2).

In his visionary 1930 study, ′Satellites des chromosomes dans le règne végétal′,

Victor Ghimpu formulated advanced hypotheses regarding the origin,

morphology, and functional role of chromosomal satellites - secondary

constrictions critically involved in nucleolus organization. His insights were later

confirmed through molecular genetics during the 1960s by the pioneering work of

Donald Brown (1931-2023), Ferruccio Ritossa (1936-2014), and Max Birnstiel

(1933-2014) [17, 68].

The vital functions of SAT (Sine Acido Thymonucleinico) chromosomes in

cellular architecture were early recognized by Sergei Navashin (1930, S.G.

Navashin, 1857-1930) [56]. Building on these observations, in 1931 Emil Heitz

(1892-1965) demonstrated that the Nucleolar Organizer Region (NOR)

coordinates the assembly of the nucleolus during telophase, establishing the

satellite as a fundamental cytogenetic marker [11]. This chromosomal dynamic

was further analyzed in the context of somatic variation by Mikhail Navashin

(1896-1973) during his extensive studies in the 1920s and 1930s [55].

Fig. 1. Variation in number,

size, and morphology of

Medicago sativa (alfalfa)

(root cells chromosomes).

Fig. 2. Morphological variation Fig. 3. Mitotic division stages in

in number, size, and shape of

SAT-chromosomes

Nicotiana (tobacco) root cells

Ghimpu originally pictures

Cytogenetics Applied to Interspecific Hybrids of Nicotiana

To fully appreciate the profound impact of Dr. Ghimpu's research, it is essential to

contextualize the geopolitical and economic significance of the tobacco monopoly

72

Gallia Butnaru

during the 20th century. At the time, state-controlled tobacco monopolies served

as central financial pillars for governments worldwide and drove the rise of major

transnational corporations. During World War II (1939–1945), tobacco was

elevated to a strategic military resource and functioned as a universal currency;

cigarettes were classified as essential wartime rations distributed directly to

soldiers. Simultaneously, the rapid expansion of smoking among women created

an unprecedented economic boom for the industry. In Romania, the Autonomous

Directorate of State Monopolies (CAM) stood as the nation's most profitable

economic institution [5]. Consequently, the aggressive pursuit of high-yielding,

disease-resistant varieties and cost-effective production triggered an explosion of

both fundamental and applied cytogenetic research [4, 6]. The demand for more

productive varieties and more economical products drove an expansion of

fundamental and applied research [33]. In the work ′Recherches cyto-génétiques

des Nicotiana résistantes à la mosaïque′ from 1942, Ghimpu explained the genetic

mechanisms of the formation of chromosomal aberrations in mitosis (Fig. 3) and,

most frequently, in meiosis, the formation of univalents and the incorrect division

of bivalents, which leads to the sterility of newly created tobacco hybrids [38].

The 20th-Century European Context: Background to Victor Ghimpu's

Karyological Research

While Victor Ghimpu was working at the boundary between cell morphology and

agronomy, cytology and genetics across the European continent were undergoing

radical transformations, often shaped by different methodological schools.

Trained at the Sorbonne, under Alexandre M.A. Guilliermond (1876-1945) and

Pierre J-L. Dangeard (1895-1970), Ghimpu pivoted from pure morphology toward

applied cytogenetics and hybridization, aligning with the French school's focus on

functional cellular analysis. [42, 18, 22].

Furthermore, his intellectual framework was profoundly shaped by the German

school of genetics, spearheaded by pioneering figures such as Theodor Boveri

(1902), Carl Correns (1900, 1909), and later Otto Renner (1924) [20].

At the time, this tradition was characterized by its highly theoretical and

fundamental

approach.

Crucially,

the

German

school

prioritized

the

developmental 'mechanics' and experimental cytogenetics. This dual focus drove

groundbreaking investigations into caryon genetics, non-Mendelian maternal

inheritance, and chromosomal dynamics during mitosis and meiosis - areas of

inquiry that remained aggressively contested among contemporary biologists [24].

Ghimpu adopted the meticulous German approach to karyotype description,

applying this rigorous methodology to the cytogenetic analysis of economically

significant crops, most notably tobacco.

He began his teaching career in 1941, at the University of Odessa, and then in

1946 he was Professor, Dean (1949) and Rector (1949) to the Faculty of

Advancing European Plant Karyology:

the 20^th-Century Contributions of Victor Ghimpu

73

Agronomy in Timișoara [48]. As a professor in Timișoara, he published the

coursebook Plant Protection (1948, 1952, 872 pages), which was structured into

three volumes: General Part (focusing extensively on cell pathology and

chromosome aberrations), Phytopathology, and Entomology. This work served as

a benchmark for both students and practitioners.

Victor Ghimpu published over 190 articles in journals such as Buletinul tutunului

(Tobacco Bulletin), Viața agricolă (Agricultural Life), and Pagini agrare și

sociale (Agrarian ans Social Pages), alongside numerous brochures and scientific

papers. Among the most notable are:

Agricultura pe câmpul internațional, Ed. PAS, București, 1925; (Agriculture in the

international field) PAS Publishing House, Bucharets, 2025.

Progresul agriculturii, Ed. PAS, București, 1926 (Agriculture Progress, PAS

Publishing Houes, Bucharest, 1926); Cultura tutunului (translation after

Prianișnikov), Ed. PAS, București, 1927; (Tobacco cultivation (translation after

Prianișnikov), PAS Publishing Houes, Bucharest, 1927).

Contribution à l’étude caryologique du genre Medicago, 1928 [30];

Contribuții à l’étude de satellites du genre Hordeum, 1928;

Recherches cytogénétiques sur les genres Hordeum, Accacia, Medicago, Vitis et

Quercus, 1930 [36];

Satellites

des

chromosomes

dans

le

règne

végétal,

Lyon,

1930;

Gebeza solurilor [31];

Infinitul mic în patologia vegetală, ′Viața agricolă′, nr. 5, București, 1935;

(Little Infinit in Vegetal Pathology), Bacteriozele plantelor cultivate și bacteriile

fitopatogene, Ed. PAS, București, 1935 (Bacterioses of the cultivated plants and

phytopathogenous bactaria, PAS Publishing House, Bucharest, 1935) [32];

Bolile soiei, ′Viața agricolă′, București, 1935 (Soyabean diseases, ‘Agricultural

Life, Bucharest, 1935) [34];

Seceta – cause, efecte,mijloace de combatere (Drought-causes, effects and means

to combat [40];

Egiptul agricol vechi și modern, Ed. PAS, București, 1937 (Old and Modern

Agricultural Egypt, PAS Publishing House, Bucharest, 1937;

Cultura tutunului în România, ′Monitorul Oficial′, București, 1938 (Tobacco

cultivation in Romania, Official Gazette”, Bucharest, 1939;

Cultura tutunului în SUA, ′Monitorul Oficial′, București, 1939 (Tobacco

cultivation in the USA “Official Gazette”, Buchrest, 1939 [39];

Bolile bacteriene ale plantelor, ′Buletinul cultivării și fermentării tutunului′, nr. 1,

București, 1939 (Bacterian diseases of the plants, “Tobacco Bulletin for

Cultivation and Fermentation” no.1, Bucharest, 1939).

Despre insecta Trips Tabaci, ′Monitorul Oficial′, București, 1939 (About Trips

Tabaci insect, “Official Gazette”, Bucharest 1939);

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Gallia Butnaru

Încercări pentru prepararea, conservarea și întrebuințarea zemei bordeleze,

′Monitorul Oficial′, București, 1939 (Trials for the preparations, preservation and

use of Bordeau solution “ Official Gazette”, Bucharest, 1939);

Contribuții generale asupra fitopatologiei, Ed. PAS, București, 1939 (General

Contributions on Phytopathology), PAS Publishing House, Bucharest, 1939) ;

Bolile și insectele dăunătoare tutunului, ′Monitorul Oficial′, București,

1941(Diseases and Harmful Insects of the Tobacco, “Official Gazette”, Bucharest,

1941);

Dușmanii noștri din totdeauna, insectele, ′Natura′, nr. 11, 12, București, 1941

(Our eternal enemies Insects “Natura” no.11, 12, Bucharest, 1941);

Sur les recherches caryologiques des plantes, Cartea Românească Publishing

House,

Bucharest,

1941

[35];

Recherches cyto-génétiques des Nicotiana résistants à la mosaïque, ′Monitorul

Oficial′, București, 1942;

Sur les satellites chromosomiques, Cartea Românească Publishing House,

Bucharest, 1943;

Impresii din America, ′Finanțe și industrie′, București, 1946 (Impressions from

america, “Finance and Industry”, Bucharest, 1946);

Protecția plantelor. Îndrumări științifice și practice pentru cunoașterea și

combaterea bolilor și insectelor dăunătoare plantelor cultivate, vol. I-III, Editura

Centrului Studențesc, Timișoara, 1950 (Plant Protection.Scientific and Practical

Guidelines for Understanding and Combating the diseases and harmful insects of

the cultivated plants, Vol.I-III, Centrul Studențesc Publishing House, Timișoara,

1950).

All of his articles, books, and specialized literature collected over time—indexed

by subject—as well as The Great Agricultural Encyclopedia (12 volumes, 1928–

1943) and The 20th Century Larousse (6 volumes, 1928–1933), are housed in the

library of the Departments of Genetics and Phytopathology. Additionally, the

microscope slide room, which contains the histological and karyological

collections prepared by Dr. Maria Neagu and Dr. Gallia Butnaru, preserves

several original slides prepared by Victor Ghimpu.

Upon Victor Ghimpu’s admission as a corresponding member of the Romanian

Academy of Sciences (actually AOSR) on December 20, 1936, his status as a

scientific authority was firmly established. This event marked the official

recognition of his contributions to cytogenetics, validating his laboratory research

and his commitment to applied science. He emphasized the paramount importance

of cytogenetics and phytopathology laboratories, arguing that they should directly

serve Romania's economic and agricultural interests rather than remaining isolated

[16].

Advancing European Plant Karyology:

the 20^th-Century Contributions of Victor Ghimpu

75

Victor Ghimpu’s work was highly appreciated, earning him the following

distinctions:

Member of the Romanian Academy of Sciences;

Member of the Romanian Society of Sciences;

Member of the General Association of Engineers in Romania;

Member of the Odessa Society of Natural Sciences;

Member of the Society for Plant Pathology of Paris.

Figure 4. 1945: The first professors of the newly established Faculty of Agronomy within the

Polytechnic School of Timișoara [15].

From left: Prof. dr. Ioan Nanu, Prof. dr. Ioan Vasiliu, Prof. dr. Eugen Prutescu, Dr. Euge Epure,

Dr. Gherasim Constantinescu, Dr. George Bujorean, Ing. Gheorghe Bungescu, Dr. Gheorghe

Valuță, Dr. Irimie Staicu, Dr. Coriolan Drăgulescu, Dr. Victor Ghimpu, Dr. Alexei S. Potlog.

Conclusions

(1) Victor Ghimpu (1896–1952) was a renowned Romanian agronomist,

karyologist, and phytopathologist, who spent a significant part of his university

career in Timisoara. He is recognized as a pioneer in plant genetics and crop

protection, with the following major contributions:

(2) In Scientific Research he is considered the first prominent Romanian

karyologist, conducting fundamental studies on chromosome numbers in various

plants, such as barley, grapevines, and tobacco.

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Gallia Butnaru

(3) In Plant Protection he chaired the Department of Plant Protection starting in

1947 and was an internationally recognized expert in combating tobacco diseases

and pests.

(4) The Academic Career: he was a professor at the Faculty of Agronomy in

Timisoara from 1946 until 1952. In 1949, he briefly served as rector of the

Agronomic Institute of Timisoara (now the "King Michael I" University of Life

Sciences). Additionally, he served as Dean of the Faculty of Agriculture and

Director of the Department. He was one of 12^thprofessors elected to organize,

initiate, and develop educational activities at the newly established Faculty of

Agriculture (1945) within the Polytechnic School of Timisoara (Figure 4).

(5) Recognition: He was a member of the Academy of Romanian Scientists

(AOSR) and a member of prestigious scientific societies in Paris and Odessa.

Today, his legacy is honoured through the ′Victor Ghimpu′ National Conference,

hosted by the ′King Michael I′ University of Life Sciences in Timisoara (USVT) -

an event dedicated to research in agricultural genetics.

(6)As a defining final conclusion, Acad. Radu Codreanu remarked to me in 1985

at the First National Congress of Science and Education of Romania: 'He was a

great scientist and cultural figure'.

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