Vampires, no reflection

Vampires, those mystical human looking creatures, that kill their pray by sucking their blood have been studied for centuries and described differently in myths, legends, books of all sorts and even movies. Even though vampire fans have observed recurring traits described in most of those stories as being really quick, really strong but also males having a beard, females not wearing lots of make up. And that would be because vampires don't have a reflection. That is one of the trait inherited that makes them such a dangerous predator. But scientifically speaking, how is it possible that their reflection does not show up in places such as windows? First one should know the difference between a polarized light and a non natural . A natural light is a light that goes in no specific direction, it goes everywhere as normal daylight. A polarized light is the result of two perpendicular natural light, that forms a light that is concentrated in one specific direction. We have discovered while studying light that if a light arrives on a window already polarized the reflection is greatly diminished. If the vampires had cells that had the capacity two direct the light sent back at them, exactly like the sepia officinalis, then their reflection would barely be.

Pants variety grew, Animal Variety Died

A long, long time ago, actually about 100 000 000 years ago, during the Cretaceous era, suddenly a great variety of plants started appearing. Until now scientists thought that would also have increased the mammal variety of specie as it would have increased their survival chances. But actually a new study shows that animal variety declined during the great angiosperm radiation of mid-Cretaceous period. A former high school biology teacher, Grossnickle, was the first one to make this discovery. He wrote a paper on this subject called  "Mammal disparity decreases during the Cretaceous angiosperm radiation,". Here is an abstract of it:

Fossil discoveries over the past 30 years have radically transformed traditional views of Mesozoic mammal evolution. In addition, recent research provides a more detailed account of the Cretaceous diversification of flowering plants. Here, we examine patterns of morphological disparity and functional morphology associated with diet in early mammals. Two analyses were performed: (i) an examination of diversity based on functional dental type rather than higher-level taxonomy, and (ii) a morphometric analysis of jaws, which made use of modern analogues, to assess changes in mammalian morphological and dietary disparity. Results demonstrate a decline in diversity of molar types during the mid-Cretaceous as abundances of triconodonts, symmetrodonts, docodonts and eupantotherians diminished. Multituberculates experience a turnover in functional molar types during the mid-Cretaceous and a shift towards plant-dominated diets during the late Late Cretaceous. Although therians undergo a taxonomic expansion coinciding with the angiosperm radiation, they display small body sizes and a low level of morphological disparity, suggesting an evolutionary shift favouring small insectivores. It is concluded that during the mid-Cretaceous, the period of rapid angiosperm radiation, mammals experienced both a decrease in morphological disparity and a functional shift in dietary morphology that were probably related to changing ecosystems.

 Grosspeckle discovered that it is true that the great increase of food did increase the amount the number of mammals on earth but also decreased the variety of mammal species, leaving almost only small, insect eating, animals.  Most of his research was made by studying the jaws of different mammals of this time period. He also noticed that the animals with quite small jaws and bodies, were the ones that did the best during this time period, we think that those were the ancestors of the therians (also ancestor of the humans).