Compared to literature on seasonal variation in mood and well-being, reports on seasonality of trouble sleeping are scarce and contradictive. To extend geography of such reports on example of people naturally exposed to high-amplitude annual variation in daylength and/or temperature. Participants were the residents of Turkmenia, West Siberia, South and North Yakutia, Chukotka, and Alaska. Healt...

At present 15 species of the Paramecium aurelia complex are known world-wide (Sonneborn 1975, Aufderheide et al. 1983). Some species are cosmopolitan (P. primaurelia, P. biaurelia, P. tetraurelia, and P. sexaurelia), while others have been found only in single localities (e.g., P. quadecaurelia). Studies concerning their distribution, however, were carried out unevenly in different areas. For i...