Notulae Scientia Biologicae (http://www.notulaebiologicae.ro), Issue 4, Volume 12, 2020: The papers published in this issue represent interesting novelties in different topics of life science. Among the exciting researches or reviews, we invite readers to find news about: The influence of human chorionic gonadotropin on hormonal and haematological profile of postpubertal male albino rats exposed to chronic oral administration of alcohol; Phylogenetic observation in Ariidae, Bagridae and Plotosidae catfishes by COI gene sequence analysis; A preliminary study and new distributional records of family Erebidae (Leach, [1815]) (Lepidoptera: Noctuoidea) from Aligarh, Uttar Pradesh, India; Evaluation of pearl millet (Pennisetum glaucum L. (R. Br.)) landraces for resistance to stem borer (Coniesta ignefusalis Hampson.) infestation; Photochemical responses of cucumber (Cucumis sativus L.) plants to heat stress; Vegetative propagation of cornelian cherry (Cornus mas L.) selections; Effect of pre-storage hot air and hot water treatments on post-harvest quality of mango (Mangifera indica Linn.) fruit; Effect of snowmelt regime on phenology of herbaceous species at and around treeline in Western Himalaya, India etc.