Germinal Pierre Dandelin
Mathematician; Dandelin Spheres in Geometry

Born
April 12th, 1794
231 years ago
Died
February 15th, 1847
178 years ago — 52 years old
Category
Thinkers & Philosophers
Country
Belgium
Links & References
Contributed significantly to mathematics and engineering, particularly in the field of geometry. Developed the Dandelin spheres, which provide a geometrical proof of the relationship between conic sections and ellipses. Engaged in research involving the properties of geometric figures and their applications in engineering. Published works that influenced the understanding of conic sections and their properties.
Developed Dandelin spheres for conic sections
Published research in geometry and engineering
Other People Born on April 12th
Sara Head
Born in 1980, a champion in table tennis competed at multiple Paralympic Games, achieving significant success. Represented Great Britain in numerous international competitions. Excelled in various classifications, showcasing exceptional skill and talent in the sport. Dedicated time to training, contributing to personal achievements and team success.
Continue ReadingPedro Cachin
This professional tennis player from Argentina turned pro in 2013. Significant performances in the ATP Tour led to the player achieving a top 100 ranking. Competed in various Grand Slam events, including the French Open and Wimbledon. Won ATP Challenger titles, contributing to an ascent in professional rankings and recognition in the sport.
Continue ReadingAlexander Ostrovsky
A noted playwright and translator, he played a pivotal role in the development of Russian drama. His works often focused on the lives of the Russian middle class and societal issues of the time. He wrote more than 40 plays that include significant works such as 'The Storm' and 'The Forest'. In addition to his contributions to theatre, he translated several foreign works into Russian, thereby enhancing the accessibility of international literature for Russian audiences.
Continue ReadingJeremy Beadle
A prominent television host and producer in England, became well-recognized for hosting 'Beadle's About' in the 1990s, a prank show that captivated audiences. Worked extensively in television production, contributing to various entertainment programs and segments. Developed a reputation for engaging humor and innovative concepts, which resonated with viewers during his career. Additionally, wrote several books and made appearances on various other television projects.
Continue ReadingManuel Neri
Born in 1930, this American artist excelled in sculpture and painting, becoming a prominent figure in the contemporary art scene. The works often explored themes of the human figure and abstraction, characterized by their expressive forms. Emerging from the San Francisco Bay Area, this artist integrated elements of the figure with dynamic applications of color and texture. The artist's contributions to sculpture and painting have been widely exhibited in galleries and museums across the United States.
Continue ReadingLucas Radebe
A South African footballer and sportscaster, played as a defender for clubs including Kaizer Chiefs and Leeds United. Represented the South African national team and participated in major tournaments such as the FIFA World Cup in 1998. After retirement, transitioned into a successful career in sports broadcasting, contributing insights and commentary on football.
Continue ReadingOther People Who Died on February 15th
Conrad III
Ascended to the throne as King of Germany in 1138. Led the German forces during the Second Crusade, a military campaign aimed at recapturing the territory lost to Muslim forces in the Levant. Participated in significant battles and campaigns, aiming to bolster Christian influence in the region. His reign was marked by attempts to assert royal authority and manage relations with powerful regional nobles. Encountered challenges from rival factions within the empire and navigated complex political landscapes during his rule. Died in 1152 while still engaged in military and administrative matters.
Continue ReadingDimitrie Ghica
Served as the 10th Prime Minister of Romania from 1866 to 1867. Contributed to the legal framework of Romania through various reforms. Played a significant role in the political landscape during the late 19th century. Engaged in the legislative process, focusing on modernization.
Continue ReadingKuzma Petrov-Vodkin
A prominent Russian painter and author, contributed significantly to the development of Russian modernism. His works often combined elements of realism and symbolism. 'Bathing of a Red Horse' remains one of the most celebrated paintings, showcasing a unique use of color and composition. Also worked as a book illustrator and created numerous artworks that reflected the social and political atmosphere of early 20th-century Russia. Engaged in teaching and inspired a new generation of artists through dedicated pedagogy.
Continue ReadingJosé de Acosta
A Spanish Jesuit missionary and naturalist, significant contributions were made to the understanding of the Americas and its indigenous peoples. Arriving in Peru in 1570, observations on the flora, fauna, and cultures led to the publication of 'Natural and Moral History of the Indies' in 1590. This work included detailed descriptions of animals, plants, and the effects of Catholic missionary work on indigenous cultures. Advocated for the humane treatment of indigenous peoples and asserted the importance of education and advocacy within missionary efforts. His writings served as an early ethnographic study and impacted future scientific exploration of the region.
Continue ReadingWally Cox
An actor and voice artist became prominent in the 1950s and 1960s, recognized for performances in television and film. Starred in the popular television series 'Mr. Peepers' from 1952 to 1956, which showcased his comedic talents. Also voiced characters in various animated series, most notably in the classic Hanna-Barbera cartoons, contributing significantly to the development of voice acting in animation. Continued to work in film and television until death in 1973.
Continue ReadingPierre François Verhulst
A Belgian mathematician contributed to the field of mathematical biology by formulating the logistic growth model, which describes population growth that is limited by resources. This model became foundational for various applications in ecology, economics, and social sciences. Verhulst published significant works on the mathematical principles underlying population dynamics and statistics. His contributions helped establish mathematical theories relevant to human and ecological populations.
Continue Reading