This paper presents the first record of Pleroma boraceiense in Minas Gerais state, Brazil. This new occurrence is significant because the species had a restricted original distribution with about 10 gatherings in São Paulo State, in the Serra do Mar. On the other hand, a previous study showed a low floristic similarity between the Melastomataceae flora of the Serra do Mar State Park and that of Serra Negra region. In order to evaluate the environmental similarity, a predictive species distribution modelling has been developed. The gathering site in Minas Gerais (RPPN Mato Limpo) showed high suitability. It suggests the need for creation of protected areas in Serra Negra, since the region is suffering environmental impacts. Based on the recent phylogeny of the Melastomateae tribe and for the purpose of correct classification of the studied species, a new combination was made for Pleroma boraceiense.

Pleroma eglanduliferum, Justino & P.J.F. Guim. sp. nov. a new species of Melastomataceae (Melastomateae) from the Atlantic Forest of Minas Gerais State, Brazil, is described and illustrated, with their affinities and diagnostic characters discussed. Pleroma eglanduliferum is closely related to P. heteromallum (D. Don) D. Don and P. tedescoi Meirelles, L. Kollmann & R. Goldenb.) P.J.F . Guim. & Michelang. by plant architecture, with quadrangular branches and similar leaf in shape and indument. However, they can be distinguished by the variation in the stamens morphology and sizes of bracteoles. Pleroma eglanduliferum must be included in Critically Endangered category, since it is known only from one population, in a restricted area.

The "origin of life" and "we are alone in the Universe" have always been unknown to the scientific community and much of the population. Astrobiology is a recent area that seeks to understand how life originated and evolved during these billions of years of the cosmos's existence. This article aims to clarify questions related to the origin of life and possible routes about the possibility of living and finding life outside the Earth, without any connection with religious dogmas. For this, the methodology used was to perform a bibliographical review on the central theme through astrobiology. This will cover topics such as microorganisms called extremophiles, conditions for a planet to be considered in a habitable region, possibilities for life to exist on Mars, and briefly address issues related to the possibility of colonization of our red planetary neighbor. With the obtained results it was concluded that Astrobiology proves to be a convergent area to the interests for the search for answers about the origin of Life and it is hoped that it can be used as a basis for future teaching and scientific dissemination work.