1933: The first kidney tranplantation was performed by Yuri Voronoy. Some sources give different dates, some even speak of the tranplantation being done in 1934 or 1936. His experiments started in 1929 and in 1930 he managed to transplant a kidney to a dog's neck. As the Ukrainian National museum of medicine reports:
Yu.Yu. Voronoy renounced the thought to take an organ from an alive man, since he thought that “one cannot make a healthy man invalid removing a necessary organ for the problematic saving of a patient”. He decided to use the kidney from a dead body. As we succeeded to establish, on April, 1933 (not in 1934, as it was informed in some sources, 1934 — is the year of publication of Yu. Yu. Voronoy’s work) the surgeon Yu. Yu. Voronoy made the transplantation of the kidney taken from a dead body. The recipient was a woman of 26 years, whose own kidneys did not function for 4 days because of acute poisoning with mercury biochloride. The donor’s kidney belonged to a man of 60 who died as a result of craniocerebral trauma, and was taken 6 hours after his death. ... She [the recipient] lived with the transplanted kidney more than 48 hours. Voronoy had every reason to think that the short-term transplant grafting (only during two days) does not compromise the kidney transplantation as the method of treatment under some forms of mercury biochloride poisonings. And what is more, he supposed that in case of dying off of the first implanted kidney, it is recommended to substitute it by a new, fresh kidney, i. e., he proposed the repeated transplantation. ... Yu. Yu. Voronoy outstripped for a long time the development of transplantology. Suffice it to say that clinical transplantations of the corpse kidney in most countries all over the world were made only in the 50–60’s of the 20th century. Professor Voronoy took part in development of other urgent trends of experimental and clinical surgery. He studied in detail the extremely important problem of the shock. But the problems of transplantology continued to remain the main ones in scientific activity of Voronoy. In 1950 he informed about 5 operations of the corpse kidney transplantation under severe nephrologic diseases.
1945: His Imperial Majesty Haile Selassie I, Conquering Lion of the Tribe of Judah, King of Kings of Ethiopia and Elect of God, emperor of Ethiopia, transfers 10,000 pounds to the population of the USSR, suffering from the consequences of the Nazi occupation.
1945: The government of the Ukrainian Soviet Socialist Republic decides to build a monument in Babiy Yar, a gully in Kiev, used by the Nazis as the place of mass executions. On September 27, 1941, 752 patients of a mental hospital were killed. On September 29-30, 33,771 Jews, almost whole Jewish population of Kiev, were executed. In October, 17,000 more Jews were killed there. Later, 621 member of the Ukrainian nationalist organization OUN were also killed. The executions were continuing till autumn of 1943, when the Soviet troops liberated Kiev. The total number of victims is not clear, various sources estimate it between 70,000 and 200,000 people. It is not clear why, but the monument was not built. Moreover, the authorities of Kiev preferred to make a dump in Babiy yar. In 1950, a wall was built and the gully was turned into a collector for liquid waste of nearby brick plant. In 1961, the wall fell and the mudflow destroyed a district of Kiev known as Kurenyovka. About 3,000 people died in this tragedy. In 1965 a granite stele was built. Only in 1976, on July 2, a monument was erected with the inscription: "To the Soviet citizens, soldiers and officers of the Soviet army, killed by fascists in Babiy Yar". Later, in 1990s, more monuments were built commemorating not all victims, but only certain groups of them: Jews, members of OUN, patients of the mental hospital, etc. There's also a cross erected in the memory of German prisoners of war.
1966: Soviet spacecraft Luna-10 becomes the first man-made object ever to orbit another celestial body. It enters the Lunar orbit and begins to collect scientific data using a spectrometer, a magnetometer and a number of other tools. Among other things, Luna 10 discovers a strange objects under the surface of the Moon, called 'mascons' (mass concentrations). On May 29, 1966, Luna 10 fell onto the Moon. On April 3, during the XXIII CPSU congress (BTW, it was the first congress where L.Brezhnev was the general secretary of the Communist Party), Luna 10 transmitted back to the Earth a sound record of L'Internationale.