Welcome to my Metazoic site! This site discusses the existence of the creatures to come along after humans will be extinct. I first became interested in a world after man when I acquired my first copy of Dougal Dixon's After Man: A Zoology of the Future in 1992. However, I unwittingly created creatures that did not exist from the time I was about 8 years old. But it was after I obtained a copy of that book (now a collector's item) that I decided to take these same creatures I created as a child and make them more realistic in an evolutionary sense. Though it may be hard for a lot of us to grasp, humans will soon become extinct. One of the biggest factors of how this will happen is the current overpopulation rate. Which is why I don't contribute to the population. I created this world with little more than mammals fulfilling all ecological niches with the help of some friends. I even gave the era of the age after man a name, I called it the Metazoic, derived from the words for "After-era" (Meta, meaning after, and zoic meaning era). We are now in the Cenozoic era. To view all the animals I have created since I began this project, you can go to the "Meet the Mammals" section of this site. To discuss your own ideas about what you think will happen in the future world, and share your ideas with others, please feel free to leave a comment.
One more thing, some of you may find this site quite offensive, and you have a right to your own opinion. But please respect my right to have an opinion too. I'm not saying there is no GOD, I believe it was HIM who got the ball rolling. But I believe after that, evolution took over. There is so much more evidence of evolution than there is of creation. Even that going on right under our noses. Other than that, enjoy yourself and visit our many links.
Wednesday, February 4, 2009
Fossils Push Animal Life Back Millions of Years
Feb. 4, 2009 -- Animal life first appeared on Earth tens of millions of years earlier than thought, according to a new study released Wednesday.
A novel technique used to date fossils buried in rock sediment in Oman shows that sponges, among the most primitive of animal organisms, flourished there more than 635 million years ago.
The new dating answers a puzzle that beset Charles Darwin.
In the mid-19th century, the first evidence for the kingdom of Animalia, also called Metazoa, came from the so-called Cambrian explosion of biodiversity, around 540 million years ago.
Darwin reasoned that this eruption of life forms could not have occurred without previous evolution, but no fossils emerged during his lifetime to confirm his hunch.
In recent years, various pieces have come forward that have indeed pushed back the rise of Animalia by some millions of years.
But the new find dates their emergence even earlier, into the final stages of a massive ice age at the end of the Neoproterozoic Era.
The Oman sponges are part of the Demospongiae class, which accounts for more than 90 percent of all sponges in existence today, notes the study, published in the London-based science journal Nature.
To find them, a team of scientists led by Gordon Love of the University of California had to come up with a new trick, for sponges lack the calcium-rich shells or bones that palaeontologists seek to provide a data signature.
So they developed an elaborate method -- based on gas chromatography and mass spectrometry, laboratory techniques for isolating molecules -- that detects unique biomarkers derived from the lipid membranes of once-living organisms.
The key biomarker is a 30-carbon steroid called 24-isopropylcholestrane, or 24-ipc for short.
To date, the only known source of 24-ipc are species of the Demospongiae, one of the three main classes of sponges.
Metazoa are by definition mobile at some stage of their life cycle and ingest other organisms for sustenance.
Most are also multicellular, meaning that they have evolved different cell types that serve divergent biological functions.
Sponges are the simplest of all multi-celled animals.
As a rule, their open-ended, sack-like bodies are fixed to rocks in shallow seas and pull in water to filter out nutrients.
Sponges were long considered the earliest common ancestor of all animals, but a genetics study last year suggested that Ctenophora, or comb jellyfish, reach even further back on the evolutionary ladder.