Human language, and grammatical competence in particular, relies on a set of computational operations that, in its entirety, is not observed in other animals. Such uniqueness leaves open the possibility that components of our linguistic competence are shared with other animals, having evolved for non-linguistic functions. Here, we explore this problem from a comparative perspective, asking whet...

The secretory end-pieces of the submandibular gland of rats during the first week of postnatal development are studied with regard to the fine structure of the secretion granules in these end-pieces. The terminal ends of the secretory ducts during this period consist of two types of cells; one cell is an acinar-type and the other is a duct-type found in the gland of adult rats. The secretion gr...

a group of animals under such a high level of threat is, quite frankly, unlike anything we have recorded among any other group of species to date. " Elsewhere, species from tiny mouse lemurs to massive mountain gorillas face challenges to survive in Africa. Eleven out of the thirteen kinds of red colobus monkey assessed were listed as critically endangered or endangered. Two species may already...

Tamarins, small Neotropical primates of the genera Saguinus and Leontocebus, have a mainly frugivorous-faunivorous diet. While consuming pulp high diversity fruit species, they also swallow seeds void them intact, thus acting as seed dispersers. Here we compare different aspects dispersal ecology tamarins with that large from Ateles (spider monkeys) Lagothrix (woolly monkeys). Due to their body...