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The singularities reached in general relativity by solving Einstein's equations have been and still are the subject of numerous scientific debates: Do singularities exist or not? Was the Big Bang an initial singularity? If singularities exist, what is their ontology? Is general relativity a theory that has shown its limits in this case? There are singularities, and general relativity, like any other scientific theory today, is not valid within the event horizon. But this does not mean, as some scientists believe, that it should be considered obsolete. After a brief presentation of the specific aspects of the classical Newtonian theory and the special theory of relativity, and a brief presentation of the general theory of relativity, in the Ontology of General Relativity chapter I present the specific ontological aspects of general relativity. The next chapter, Singularities, is devoted to presenting singularities that result in general relativity, specific aspects of black holes, and event horizons, including the debate about the Big Bang as the original singularity, and the arguments for the existence of singularities. In Ontology of Singularities I talk about the possibilities of ontological framing of singularities in general and black holes in particular, about the hole argument put forward by Einstein, and the arguments presented by scientists that there are no singularities and therefore that the general theory of relativity is at a standstill . I conclude with the Conclusions in which I briefly state and resume the arguments that support my views presented above.

As eugenics is defined, it is very difficult to make a clear distinction between science (medicine, genetic engineering) and eugenics. And to establish a line over which genetic engineering should not cross, according to moral, legal and religious norms. As long as we accept the help of genetics in finding ways to fight cancer, diabetes or HIV, we also implicitly accept positive eugenics, according to the current definition. And as long as we accept genetic screening, and interventions on the unborn fetus, or abortion, we also implicitly accept negative eugenics. Furthermore, at the level of governments, although eugenics is officially repudiated, it was legalized in many countries until recently, and is still accepted and legalized, albeit in more subtle forms, even today. In the Introduction I define the term and ways of classification. Next is the History of eugenics starting from the ancient period, the introduction of eugenics by Francis Galton, the practice of eugenics as a state policy in various countries, and current eugenics (liberal eugenics). I then analyze various issues raised by the Ethics of Liberal Eugenics, and have developed a separate section for The Future of Eugenics, focusing on the Human Genome Project. Finally, in the Conclusions section I present my personal views on the current practice of eugenics.

About the possibility of time travel based on several specialist works, including those of Nicholas J.J. Smith ("Time Travel", The Stanford Encyclopedia of Philosophy"), William Gray ("Troubles with Time Travel"), Ulrich Meyer ("Explaining causal loops"), Simon Keller and Michael Nelson ("Presentists should believe in time-travel "), Frank Arntzenius and Tim Maudlin ("Time Travel and Modern Physics") and David Lewis ("The Paradoxes of Time Travel"). The paper begins with an Introduction in which I give a brief introduction to time travel, and continues with a History of the concept of time travel, presenting the main physical aspects of time travel, including time travel in the past in general relativity and in quantum physics and travel in time into the future, then an introduction to the Grandfather Paradox which is addressed in almost all specialist works, followed by a section devoted to the Philosophy of Time Travel, and a section where I analyze the Causal Loops for Time Travel. I conclude the paper with Conclusions, in which I present my personal views on time travel, and the Bibliography on which the paper is based.

One of the most contested controversies regarding the priority of scientific discoveries is the one regarding the law of universal gravitation, between Isaac Newton and Robert Hooke. In this essay I expand on an older work on the same theme, "Isaac Newton vs. Robert Hooke in the law of universal gravitation”. Hooke accused Newton of plagiarism, taking over his ideas expressed in earlier works. In this paper I try to show, based on previous analyses, that both scientists were wrong: Robert Hooke because his theory was basically nothing more than ideas that would never have materialized without Isaac Newton's mathematical support; and the latter was wrong in not acknowledging any merit to Hooke in working out the theory of gravitation. Moreover, after Hooke's death and assumption of the presidency of the Royal Society, Newton removed from the institution all traces of the former president, Robert Hooke. Also, his "inferior" social status contributed to the denial of Hooke's contribution, being nicknamed by his contemporaries "the mechanic", in contrast to the noble Sir Isaac Newton. For this I detail the accusations and arguments of each of the parties, and how this dispute was perceived by the contemporaries of the two. I finish the paper with the conclusions drawn from the table of contents.

The modern town of Drobeta Turnu Severin has a relatively new history. It made its appearance on the map of Romania and on that of the world following General Pavel Kiseleff’s decree on the 22nd of April, 1833. The town got its name from the majestic remains of the Severin Fortress which used to look down the Danube and surrounding region at some ancient times. It was erected following a pre-established plan, with wide streets falling perpendicularly onto the Danube or running parallel to it. Drobeta Turnu Severin has warm summers and mild winters, meaning the city is home to magnolia trees, Caucasian nut trees, and gingko biloba as well as the almond trees, figs, lilacs, lindens, and chestnut trees more common throughout Europe. The museum of the Iron Gates Hydropower Station together with the Turbine Hall, the Vodita Monastery, as well as the St. Ann Monastery of Orsova can be easily reached from Turnu Severin. It is from this region that the wonderful area of Cazane becomes accessible both by water and by land. ,,Turnu Severin shows itself in the sunset as in the middle of a decor. Widened, the Danube cuts a curve in the Romanian bank and pushes the town up on a top coverd with trees, the thicket of which discloses overlapped houses enveloped in red hallow dies… A western town with beautiful buildings, great schools, wide and straight streets…”, Drobeta Turnu Severin, Mehedinti, Romania