who was the first person to measure the earth's circumference
Eratosthenes He is best known for being the first person to calculate the circumference of the Earth, which he did by applying a measuring system using stadia, a standard unit of measure during that time period. His calculation was remarkably accurate. He was also the first to calculate the tilt of the Earth's axis (again with remarkable accuracy). Additionally, he may have accurately calculated the distance from the Earth to the Sun and invented the leap day.[4] He created the first map of the world, incorporating parallels and meridians based on the available geographic knowledge of his era.
Charles Darwin Darwin was a prolific writer. Even without publication of his works on evolution, he would have had a considerable reputation as the author of The Voyage of the Beagle, as a geologist who had published extensively on South America and had solved the puzzle of the formation of coral atolls, and as a biologist who had published the definitive work on barnacles. While On the Origin of Species dominates perceptions of his work, The Descent of Man and The Expression of the Emotions in Man and Animals had considerable impact, and his books on plants including The Power of Movement in Plants were innovative studies of great importance, as was his final work on The Formation of Vegetable Mould through the Action of Worms.[202][203]
John Addison John Mervyn Addison (16 March 1920 – 7 December 1998) was a British composer best known for his film scores.[1]
Wilhelm Wundt A survey published in American Psychologist in 1991 ranked Wundt's reputation in first place regarding "all-time eminence" based on ratings provided by 29 American historians of psychology. William James and Sigmund Freud were ranked a distant second and third.[7]