Animals

Today I´m gonna talk about the animals, first of all I would like to describe what an animal is: an animal can be defined as a major group of eukaryotic cells, those cells conserve many of they features through many processes called metabolism. Most of animals are motile, that means they can move around by herselfs; most of them are also heterotrophs, they need another organisms for living. Like all the living beings, the animals are in a constant process of autopoesis, they are a "self-production machine".

 But today I wanna talk about especifically about one of the world´s rarest animals: the platypus.
The platypus (Ornithorhynchus anatinus) is a very strange animal endemic of Oceania, its a semi-aquatic mammal, but is one of the 5 rare mammals that put eggs instead of having living calves.
Those rare animals are called monothremes and have many special features: they are mammals, they put eggs,  but they also produce milk fot the babies.
The platypuses are also venomous, they use this venom to protect themself of the predators.
I like the platypuses very much, I think they are very interesant and amusing, I have never seen a Platypus, nor in the Zoo. I think the people who saw them for the first time were extreme amused, and they didnt knew how to catalogate this kind of animals, because they really are out of the classical definition of the mammals. But in that way, I think is the most interesant think about the platypuses: the are like a living chain in the evolution between the aquatic/oviparous animals and the terrestrial/vivparous, they are like living fosils of evolution processes.