Adventure Ausrama Blog

The argument continues over whether humans were responsible for the extinction of megafauna. Giant emus, large kangaroos, marsupial lions and diprodons were destroyed by Aboriginals in Australia according to new research. This claim is based on fungi in dung of herbivores. For 130,00 years, despite dry periods, charcoal and pollen levels in dung remained the same until Aboriginals arrived. This means that climate change was not responsible for the extinction of megafauna 40,000 years ago. There is a problem with this. When Captain Cook arrived in Australia the Aboriginal population was extremely low. Forty thousand years ago there would have been only a few hundred thousand of them. How could this low number possibly destroy all of the large animals? Some megafauna would have survived in regions where Aboriginals did not go. Australia is a very large continent. It is claimed that when the megafauna died out the vegetation changed with more fires, and eucalyptus forests spr

"I reckon we should take life real easy." http://vistacomputersolutions.blogspot.com/ . . . . . . . . . . . . . .

"Got any tips? Yeah Little Boy in the 2.30." http://vistacomputersolutions.blogspot.com/ . . . . . . . . . . . . . . . . . . Funny Animal Photos

Mussel sperm have to find the right egg. This is not as easy as it seems. When the eggs are released they can be scattered through ocean water or river. While mussels are attached to rocks, eggs and sperm are at the mercy of the elements. The eggs have to let sperm know that the eggs are available, so they send out a chemical message to attract suitable sperm. Many species release chemical signals. The message sent has to be differentiated to prevent fertilization by siblings. A test was done forcing sperm to fertilize chosen eggs. Only compatible matches gave healthy offspring. In a later test mussel sperm were observed to choose compatible eggs to produce health young. This is the first time chemical attraction has been observed in mussels. It shows how important compatibility is in many species. This brings into question the theory of gene pools where there is deemed to be no barrier to gene pairing. The idea that any male and female can have offspring no longer stan

"What a gorgeous day for a suntan." http://vistacomputersolutions.blogspot.com/ . . . . . . . . . . . . . . . . . . Funny Animal Photos

There is something strange going on with the weather. Despite reports telling us that Australia is becoming drier we are getting more rain than ever. They say that global warming will make it rain more but water will evaporate faster. In Britain they may have to set water restrictions because it is raining less. Holding water in dams in Australia at the moment is a silly idea. With La Nina seemingly fixed off Australia's coast more and more rain is predicted. Some east coast towns, many inland, have had three house-destroying floods in three years. The poles are melting. We know this. Yet long-term predictions about future weather for different countries is like water divining. It seems to be right, though the truth will be known only by what actually eventuates. If the sea does rise and Australia still gets flooding rains people will abandon low, flood-prone regions permanently. There are only so many times you can repair a house. Australia will become what it has be

NASA scientists are now saying that "soil" on Mars could support vegetable life. Without an atmosphere, though, it seems no life is possible. Scientists are specific enough to say that asparagus and turnips will grow in Mars' soil but strawberries will not. Are they joking? Or are they for real? The Phoenix Mars Lander found soil that is very much like that in many Earth backyards. Scientists are shocked that they have found soil. It is alkaline - thus, the claim that it is not good for strawberries. Apparently, the soil is rich in trace minerals. My, how scientists can be wrong. It was thought that Mars "soil" would be salty - with no atmosphere and the sun would bleach it. But they were wrong. At least we know that there is soil and water in the form of ice just beneath the surface. There is evidence that in the past water flowed on the surface because erosion is evident. Rivers, lakes and oceans existed there once. Water reservoirs such as these indicate