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The floor-polynomials

Modular arirhmetic, aka arithmetic of clock, is a branch of mathematics studying remainders in division. Although it may seem unnecessary, it’s the central part of most bank or e-mail login systems and is a key idea of checksums that allow …

A comparison of primates’ memory and learnig skills, with use of an interactive platform in the Warsaw Zoological Garden

The purpose of this study was to compare learning and memory skills among three species of primates. Each of the studied species represented different branches of evolution: black-and-white ruffed lemur Varecia variegate –  the lemuriform primates; golden-bellied capuchin Sapajus xanthosternos …

Taxonomic diversity of the Middle Ordovician – early Silurian echinoderms from Siljansringen, Sweden

Palaeontology is mostly associated with dinosaurs. Of course, overlords of early continents can affect our imagination, but only few people realize that occurrence of huge reptiles was very short part of the life timeline. For the most time of its …