Hallucigenia


Neither the science fiction writer Isaac Asimov, was as rare as this animal had happened. Get the name of Hallucigenia, a marvel of evolution. Its name refers to the word "hallucination", which is what they believed passing the first to see it, as this seems strange prehistoric animal that has been designed by a crazy artist, or an elephant or a dolphin. The paleontologists who discovered not believe what they saw, in fact, did not know its classification; if it was a plant, if it was face up or face down, did not know if he had head and where it was.

They were hallucinated when they found this impossibly small animal that was no more than 4 cm in length and that's apparitions in the Cambrian explosion, when there was the proliferation of life forms, some as strange as this.


As its body is tubular in shape, it is not easy to distinguish, in what place is the head. In fact, experts believe that the head is one of the bulky and ends with two appendices, but it's an assumption that an idea based on a test-out there.

Sensing where the head came next question was: how do walking? And still do not have the solution, after 40 years and several fossilized specimens found. The Hallucigenia had several protrusions. On the one hand, had 7 hard spines, and at first experts thought that moved like sea urchins .... moving the thorns. Then it found that he also had a soft tentacles moving in the opposite area .... how moving it? With the spikes or tentacles? Well, although it seems that the latter is more accepted, do not become totally agree ... and I do not know what to say.I will however get wet at the risk of saying the wrong thing (as you know, ignorance is very bold) If you walk with the tentacles, these could get food and on the other hand, the spines serve them to fend off potential predators. If it walk with barbed tentacles would not do them much good, much less as a defense. Therefore, to put right the Hallucigenia would say his feet were moving tentacles.

To give you a better idea of ​​the confusion brought about by the discovery of this animal, you even now some paleontologists think that it is an animal, but part of an even larger animal.
With what the story is a bit more complicated.

Anyway, if any of us, or our children, we traveled back in time to the Cambrian; Earth that we know seem another planet in another system, another galaxy and other different physical laws .... at least.

Rugops


Not all prehistoric animals are frightening Tyrannosaurus, Allosaurus and Spinosaurios ... no, there are others .... but those do not interest us today (MUAHAHAHA) .... we want blood, claws, large teeth and formidable carnivores able to intimidate only imagine. Let the beasts that we like, for example, to Rugops. This prehistoric animal of the Cretaceous (about 95 million years ago), lived in Africa and is a terrible theropod (like the T-Rex for example) family of abelisaurs (lizards Abel) ...

While Rugops (wrinkled face) was large: it could reach 8 feet long and weighs same as a hippo, never got the position of dominant predator. As we have said, lived in Africa, and in that time there was another predator floating around .... the Spinosaurus.

It is this reason that some experts think it may be more of a scavenger rather than a predator ... but do not really understand how they have come to that conclusion. Right now, today, we see that the lion is bigger than a hyena, hyena hunting but even more than the lion.
Other features of this carnivore is that had small arms ... now I can say "Most theropods have small arms." Yes, true, but the Rugops was an animal with proportionately still smaller forelimbs, were little more than stumps .... to give you an idea, our arms are longer than the arms of Rugops. And considering that I could reach 9 meters is simple we get an idea of ​​their hands ... or little claws.

Moreover, as the name suggests, its skull had a half meter bony protuberances, full of venous capillaries that gave its a gruesome appearance, as if it were bad and deformed film.

Finally, some authors believe that had spikes on the neck and tail. Although they found no evidence of this, nor of barbs or inserts .... but hey, maybe that is because lately it is changing the conception we had of the saurian, such as T. Rex, is probably had therefore also the Triceratops, a few years ago it was learned that Velociraptor had feathers ... anyway. 

Below, Spinosaurio having hunted and waiting for the bottom Rugops their cake.

Arandapis

If retrocediéramos in time 475 million years to the Ordovician, we would see that our planet Earth is totally different as we know. It is very hot, and it's easy to find places with temperatures exceeding 50 º. The continents were all together and formed what is known as Gondwana, an enormous supercontinent, and therefore, if there was a supercontienente also had a superocéano called Panthalassa, meaning "all the seas".

Most would find animal life in the sea, and of course, we would not find, orcas, whales or sharks, or even, similar animals. Arthropods and vertebrates ruled the prehistoric seas and began to emphasize vertebrate species timidly, promised much for its featuresin particular the spine.

One of the first was the Arandaspis marine arthropods, one of the first fish that descended from Pikaia and that would lead to the wide range of armored fish as Dunkleosteus.

This aquatic fish, just have information. It was found some 60 years ago in Alice Spings, Australia and its name comes from the tribe that inhabited those lands (Aranda). It was about 15 cm and started having bony plates on the body that gave some protection, began to form the shield would then armoured prehistoric fish.

These fish were small, and a feature of them was that they had jaw (some experts think they did have), only a small, hard lips that helped him to swallow everything that was while prospecting in search of food. In our view, it would seem a tadpole, but bigger and harder. Anyway, as I introduce you to one of the first vertebrates to have lived on Earth and apparently, succeeded because it appeared a large number of new species.

Giant baboon


We all know that we come from Australopithecus, one of our ancestor that lived about 3 million years ago in the African plains. Was the size of a chimpanzee, maybe a little bigger, and the main feature is that it walked on two legs. For this ancestor must be careful lest he deal with large hyenas, lions giants, especially with a cousin who still have descendants today: giant baboon (Theropithecus brumpti).
Baboons (or Papios) current are very fierce, in some cases, a male only stood up to leopards weighing more than twice and have formidable weapons ... imagine what they can do in droves. As for weapons, the baboon is a wonder: is agile, fast, fierce fangs and has serious injuries that may infringe their predators. They do not usually spend more than 40 kg, and usually live in herds gathering, are omnivores. Peaceful coexistence is with them, and that is why coming up and impalas graze beside ... until suddenly, they go crazy, they catch a baby impala and cut up to bite. The same goes for other animals such as hares, rabbits, small antelopes and birds.


3 million years ago, our ancestor, Australopithecus could be eaten by giant baboons, as current devour small antelopes. They lived in the same places and in some ways were rivals and as rivals, Austra had much to lose. While Australopithecus could reach 60 or 70 kg in weight, the Giant Baboon exceeded 200 kg. And while standing Australopithecus measured 1.3 meters, the Giant Baboon reaches 1.90 or 2 meters. So these two (the Australopithecus and the Giant Baboon) shared resources, but perhaps, once the big fish ate the kid ....

Perhaps 3 million years ago, we would see a pair of giant baboons on a zebra, trying it down to eat it and it could be a zebra or hyena or a leopard, or a wildebeest, or maybe a monkey smaller but more important in human evolutionary history .... Australopithecus.

Dilophosaurus.


When I saw it for the first time (Cretacic) Jurassic Park ...


I thought ... - it is impossible that this creature may exist, they have been wrong. But I was the one who was wrong was thinking this ... it really did exist. It was a lizard in the Cretaceous that lived 200 million years ago in what is now North America and parts of China. Its name refers to its main feature: Dilophosaurus means "lizard two peaks". A bone crests that run along the cranial vault and are coming together in approaching the nostrils and give it a look as angry.

But apart from these two bony protrusions, it is noteworthy that the two membranes are born from the beginning of the neck and which maintains folded until suddenly extends them. Are thought to this membrane was deployed when was intended to look bigger compared to others that might arise as a threat, rather large lizards or other species of the same species. At initially thought that also served as a deterrent in clashes pairing ... but maybe this idea is wrong because females also exhibit membrane. Finally, females may also have to fight each other for territory.



These membranes resemble the actual Frilled, but much larger. In fact, the Dilophosaurus was a super-predator of the time. Media about 7 meters long (22 ft.) and weighed about 350 kg  (770 lb.).... in fact it was light enough for its size. It was fast, bipedal, with skull rather small and not massive, and long and slender neck and tail. In its skull had a boss that we have appointed a small crest bone.

By their fossil remains are thought to the Dilofosauro, was devoted to feeding carrion and small game, as it had no bite, no mass, nor necessary for hunting large prey strength. Another idea that seems well founded is that since it has long, thin teeth, with long necks and light heads, it is possible that much of their diet from fish outside.

And finally, something I do not know, where Jurassic Park were removed this prehistoric animal they are poisonous? That is not proven.
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