extinction
In biology and ecology, extinction is the end of an organism or of a group of organisms (taxon), normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "re-appears" (typically in the fossil record) after a period of apparent absence.
For more information about extinction check the Wikipedia article here
ZME Science posts about extinction
A new study sheds new light on the impact humans had on the local aviary fauna in the Pacific, after the authors conclude that human colonization of the Pacific Islands is the main driving factor that wiped out some 1,300 bird species in the area or roughly 10% of the entire bird population on the [...]
So far… it’s re-extinction Almost 10 years ago, on July 30, 2003, a team of Spanish and French scientists reversed time. They brought an animal back from extinction, if only just to see it go extinct again. The animal they revived was a kind of wild goat known as a bucardo, or Pyrenean ibex. For [...]
I had the chance to witness, on several occasions, how bears change their behaviors when people feed them (which they really shouldn’t!). Bears, who usually just avoid people, or if they feel threatened display some sort of aggressive behavior, just started to beg for food, much like a dog around Thanksgiving dinner. This dramatically altered [...]
Apparently, every month brings forth a new theory on the demise of the Neanderthals – the cookies one being that bunnies were the main culprit. This month’s theory claims that the Neanderthal skull has larger eye sockets than the human one, therefore it had bigger eyes, therefore the brain spent more of its processing power [...]
This bright little fellow is known as the lesula to the local people of a remote part of the Democratic Republic of Congo, and as of recently has been recognized as a new, distinct species of monkey. Lucky for the lesula, the discovery came in the nick of time for preservation efforts to be rolled, [...]
The world we’re living in seems to be heading towards a mass extinction, in which humanity plays a crucial role. Sadly, Asia, the largest continent in the world is one of the ‘leaders’ in terms of wildlife extinction. According to the Wildlife Conservation Society, the Asian governments must take action to protect Asian species, which [...]
As it turns out, no one single factor was powerful enough to wipe out the woolly mammoth – instead, a sum of factors acted towards their demise, much like many animals are threatened today. Woolly mammoths roamed the globe for 250.000 years, wandering from North America to Europe to Asia, until they were driven extinct [...]
A recently published study suggests that the Earth might have been visited by a giant space rock 13,000 years ago, an event which might have sparked an unusual cold period in the planet’s climate history. The Younger Dryas, also known as the Big Freeze, was a brief period of cold climatic conditions and drought which occurred [...]
During man’s exploits through out history, a great number of species were driven to extinction, either by excessive hunting, habitat destruction, disease or pest introductions and so on. There are currently around 11,000 animal species listed as endangered, and the list is getting ever thicker each day. During the past few decades, as awareness to [...]
Climate change and over-fishing are held responsible for the swift collapse of coral reefs and the propagation of mass extinction among marine life. According to the International Programme on the State of the Ocean (IPSO), which presented the study this Tuesday to the U.N., the Earth is faced with its biggest spate of mass extinctions [...]
Anomalocaridids were extremely weird animals, by today’s standards; but by the standards of the Cambrian, they were the hot guys. They had a long spiny head, powerful limbs which were probably used to snag prey and a series of blade-like filaments in segments across the animal’s back, which could have functioned as gills. During the [...]
Usually, we tend to think of Neanderthals as being our bigger and stronger but not-so-intelligent cousins, but that may very well not be true; it has been shown on several occasions that Neanderthals were quite smart, and they could figure out a whole lot of things by their own, without immitating humans. In recent years, [...]
It seems that more and more species are threatened by extinction, and this doesn’t apply only to animals. A recent analysis conducted the Royal Botanic Gardens, Kew together with the Natural History Museum, London and the International Union for the Conservation of Nature (IUCN) concluded that 22% of all the plants in the world are [...]
As the dramatic decline of the tigers becomes more and more abrupt, it seems more and more possible that pretty soon, we will be living in a world without tigers. Numerous plans and various approaches have been taken, but the results have been pretty scarce so far, and the fate of these wonderful felines seems [...]
A recent study conducted by a Montana State University doctoral student and one of the world’s top paleontologists shed some new light on more than 100 years of thought regarding the dinosaurs known as Triceratops and Torsaurus. The general belief since the late 1800s was that they were two separate dinosaurs: Triceratops had three horns [...]
The previous 5 mass extinctions wiped out more than three quarters of the world’s animals, and if things continue to move in the same way, the same thing will happen in North America, according to a University of California, Berkeley, and Pennsylvania State University analysis. Numerous scientists have warned that the direction things are moving [...]
In 1980, Luis Alvarez and his team shocked the whole world when they announced their theory that an asteroid impact that took place 65 millions years ago was responsible for the extinction of the dinosaurs and much of that time’s living organisms. Despite the fact that they delivered substantial evidence, there are still some minor [...]
The mass extinction theory is… a theory, because there are still some blanks left in to fill by scientists; of course, there are those who try to fight it and find other theories and those that try to back it up and fill in the missing pieces of the puzzle. Now, the latter camp recorded [...]
One of our planet’s most significant misteries is the one concerning the massive extinction that took place about 252 million years ago. As it turns out, the shores of ancient Alberta, British Columbia and the Canadian Arctic were a very important refuge for the ancient animals that were threatened; most of the animals that lived [...]
Tue, Mar 26, 2013
0 Comments