Did you know that... In 1883 Zygmunt Wróblewski and Karol Olszewski were the first to liquefy oxygen, nitrogen and carbon dioxide from the atmosphere in a stable state (not, as had been the case up to then, in a dynamic state in the transitional form as vapour).

One of the first Polish scientists, Vitello (Witelo), was conducting experiments already in the thirteenth century which became the basis for early optics . He described the construction of the eye and attempted to explain how it works. His views continued to be regarded as valid until the sixteenth century, evidenced by the fact an edition of his work was published in Nuremberg in 1535. Polish scholars' work was often ground-breaking, despite the fact that their successes may have been all but forgotten. Americans are considered to be the pioneers of the oil industry, for example, but it was a Pole, Ignacy £ukasiewicz, who constructed the first paraffin lamps to be used for a practical purpose: in July 1853 his lamps lit up a hospital operating theatre, and in 1856 he founded the first oil well, in Bóbrka, while the first oil well in Pennsylvania did not open until five years later.

To be sure, these accomplishments were minor compared to those of Maria Sk³odowska-Curie, the most famous Polish woman scientist, twice awarded the Nobel Prize: once for physics (1903) for her research on radiactivity, and a second time for chemistry (1911), for her discovery of two elements, polonium and radium.

Many Polish scientists followed in the footsteps of Maria Sk³odowska-Curie. One of them was Marian Danysz, a specialist in the field of nuclear physics, who was also one of the team which first obtained the radioactive  isotope of fluorine and the double hypernucleus. Another was Józef Rotblat, who did research in nuclear physics and also campaigned to prevent the proliferation of nuclear weapons as one of the organisers of the Pugwash Conference. He was awarded the 1995 Nobel Peace Prize.

"... Mendels introduced me to Professor Leopold Infeld who had come to Toronto after several years with Einstein. Infeld, after talking with me (in a kind of drawing room oral exam), concluded that my real love was physics and advised me to major in an excellent, very stiff program, then called mathematics and physics, at the University of Toronto. He argued that this program would enable me to earn a decent living at least as well as an engineering program. ... I was fortunate to find an extraordinary mathematics and applied mathematics program in Toronto. Luminous members whom I recall with special vividness were the algebraist Richard Brauer, the non-Euclidean geometer, H.S.M. Coxeter, the aforementioned Leopold Infeld, and the classical applied mathematicians John Lighton Synge and Alexander Weinstein..." Walter Kohn, Autobiography Walter Kohn was awarded the Nobel Prize in chemistry in 1998.

Poles have often collaborated with the world's greatest scientists. One of them was Leopold Infeld, who worked on the theory of relativity. Together with Max Born, who was later awarded the Nobel Prize, he worked on electromagnetic fields and formulated the Born-Infeld law of electrodynamics. In 1936-1938, he worked with Albert Einstein in the Institute for Advanced Study at Princeton. Their cooperation resulted in the book The Evolution of Physics (1959), which was intended to make the theory of relativity more accessible to lay people. Mieczys³aw Wolfke is known for his discovery of two types of liquid helium, of which He II is still the only known  superfluid liquid. He did ground-breaking work in holography, an area of optics dealing with the creation and recording of three-dimensional images: in 1920 he divided the process of creating such images into two distinct phases by using two beams of light, each having a different wavelength. Marian Smoluchowski, who described Brownian motion, worked on the kinetic theory at the same time as Albert Einstein. In his work, he presented an equation which became the basis of the theory of stochastic processes. Another Polish scientist, Maksymilian Huber, studied the physical properties of materials. His research led to the presentation of the Huber criterion, which describes the conditions in which materials submitted to a complex load reach a dangerous state in which cracks or irreversible deformation occurs. This has enormous significance in the design of buildings, bridges and other structures that must withstand heavy loads.

"Anyone who knew Smoluchowski closely valued him not only for his quick mind, but also as a noble human being." Albert Einstein

Wojciech ¦wiêtos³awski, the father of modern thermochemistry, was nominated twice for the Nobel Prize. He developed a static method of cryometric measurement and a new method of testing coal. ¦wiêtos³awski was Vice-Chairman of the International Union of Pure and Applied Chemistry (IUPAC) and created the foundations for a new branch of physical chemistry,: polyazeotropy.

Did you know that... Denis Gabor, the 1971 Nobel laureate in physics, named Mieczys³aw Wolfke as one of his precursors in the development of holography.

Jerzy Pniewski and Marian Danysz made important contributions to the development of physics. In 1952 they discovered the elementary particle known as the  hypernucleus, a special atomic nucleus which contain hyperons in addition to neutrons and protons. This also meant the discovery of material that was in a new state: hypernuclear material. In their time Marian Danysz and Jerzy Pniewski were serious contenders for a Nobel Prize. Witold Nazarewicz also studies atomic nuclei, in particular the nuclei of "exotic" atoms, i.e. those which have formed as a result of collisions between radioactive nuclei. Elements present on Earth are stable, which means that their nuclei do not decompose spontaneously. Studying these exotic nuclei, which are found in exploding supernovae, may help to understand the process by which elements are formed. Witold Nazarewicz is the scientific director of the Joint Institute for Heavy Ion Research of the Oak Ridge National Laboratory at the University of Tennessee, and also works at the University of Warsaw.

In his research, Professor Jacek Kalinowski exposes objects placed in a very strong magnetic field to radio waves, which makes it possible to distinguish between larger and smaller particles. This research may increase the number of products which can be obtained from mineral sources.

In school, everyone learns about Mendeleev's (and, more recently, Niels Bohr's) periodic table, but Adam Sobiczewski showed, thanks to the "islands of stability", that the table is not yet complete.

Maria Sk³odowska-Curie (1867-1934) is an unusual figure in the pantheon of Polish scientists. A double Nobel laureate who discovered two new elements, she was a pioneering scientist. She began her education in the "Flying University",  underground courses organised in late nineteenth-century Poland for women. In 1891 she left for France, where she studied at the Sorbonne, after which she devoted herself entirely to the study of radioactive substances. She was the first woman to receive a doctorate from the Sorbonne, and also the first woman professor at that institution to head one of its departments. In 1897, Sk³odowska searched for a subject for her doctoral dissertation. In the students' library, she found reports by Antoine H. Becquerel, a professor of physics at the Paris Polytechnic, about the discovery of new, mysterious radiation emanating from lumps of ore containing uranium. Sk³odowska began to study this phenomenon, which became known as radioactivity. During her many years of research and observations, Sk³odowska-Curie found that some of the uranium and thorium compounds emit significantly more energy than would be expected given the quantities of the two elements involved. This research put her on the trail of previously unknown elements, the first of which was named radium (from Latin, radius, "ray"); the second was named polonium, in honour of her native country. Maria conducted her scientific studies together with her husband, Pierre Curie. For other scientists to acknowledge their discoveries, the husband-and-wife team would have to extract pure elements from the isolated salts. The only pitchblende mine functioning at the time, in Jachymov, Bohemia, gave them a gift of a ton of debris, the by-product of uranium glass manufacturing. They bought another seven tons, and then refined them in a shed outside Paris which had been converted into a laboratory. Four years later, Maria and Pierre had obtained one-tenth of a gram of radium chloride (RaCl2) from those eight tons of material. Maria succeeded in extracting 0.08 g of pure, metallic radium only after eight more years of work, after the death of her husband. Up to the present day, the total amount of radium which has been extracted, worldwide, is approximately 500 grams. It is used as a source of gamma radiation, (usually in the  chloride or bromide form) in the treatment of cancers and some skin diseases. In 1903, Maria Sk³odowska-Curie, Pierre Curie and Antoine H. Becquerel received the Nobel Prize in physics for their research on radioactivity. After her husband died, in 1906, Maria became director of the Radioactivity Department in Paris. There, she made her most important discoveries on the properties of radium and polonium. The Radium Institute in Paris was also created at her initiative. In 1911, the Swedish Academy of Sciences once again honoured her with a second Nobel Prize, this time in chemistry for her discovery and isolation of two new elements.