The National Atomic Museum is the nation's only congressionally chartered museum of nuclear science and history. The museum was established in 1969 as an intriguing place to learn the story of the Atomic Age, from early research of nuclear development through today's peaceful uses of nuclear technology.
Formal studies in the history of mathematics developed much more slowly than studies in mathematics itself. There is a particular difficulty in that those who are well trained in historical analysis are typically insufficiently versed in mathematics to be able to appreciate the subject at hand. This has left mathematicians to write their history, by and large, although they are usually untrained for that task.
Physicists have been honored by having their picture on currency in many countries around the world. Some are shown in small images below. Click on the colored text to view or down load a larger copy of the image. (The size of each image is shown in parentheses.)
Extends from 1 Sept of the previous to 31 Aug of the given year. Used in Byzance, South Italy and Sicily, until 1087 used by the Papal curia
This calendar includes all the major feasts, but not the ordinary festa.
The "greatest European mathematician of the middle ages", his full name was Leonardo of Pisa, or Leonardo Pisano in Italian since he was born in Pisa (Italy), the city with the famous Leaning Tower, about 1175 AD.
In this project I try to gather all kinds of information found on the web about voyages of discovery and exploration.
Unfortunately none of the people to inhabit the land of present-day Latvia in the ninth millennium B.C. left their memoirs. New Indo-European tribes, living by stock raising and farming, appeared here in the second millennium B.C. They were the ancestors of the Baltic tribes - the Letts (the Kursi, Zemgali, Latgali) and the Lithuanians. The Latvian nationality subsequently came into being, as a result of the convergence of these tribes, sharing similar languages, cultures and economic ties. Historians have found the Balts first were mentioned in the book of the ancient historian Herodotus - in his Book IV of Historiae he described the nation Neuru which was later identified with ancient Balts. The peoples of the Mediterranean were interested in the Baltics mostly because of the amber found there. We can find the Baltic peoples mentioned also in works of Claudius Ptolemaeus (around 150 A.D.). In one of the IX century chronicles there was the first mention of a Latvian tribe - the Chori, but still in Western Europe there was not much known about the nations living on the coast of the Baltic Sea. One of the significant sources about the ancient Balts is the Icelandic historical Sagas (Islendingasògur and Konungasògur). [Radins, 1996]
The Islamic calendar is based on visibility of the crescent Moon. This is a very difficult scientific problem. We know perfectly well where the Moon and the Sun are at any given time, but how light must the Moon be and how dark must the sky be before we can see the crescent? And what if the weather is bad?
