Adventure Ausrama Blog

Just when a girl has her first period is genetically based. It is determine by more that 100 parts of the the human genome. It is not affected by more good food, etc., as was once believed. Furthermore, good food intake is not making girls menstruate earlier. Going into adulthood sooner is a danger to health. The chances of getting type 2 diabetes, cardiovascular disease and breast cancer is increased. These findings come from an international study carried out in 166 institutions. It seems that diseases are usually limited to a few parts of the genome, while menstruation involves a surprisingly large number. It is whole-body function. Indeed, one's physical and social surroundings could also play a part in triggering genes. Yes, a better diet has lowered the onset of menstruation from 17 years of age in the 1800s to 12.5 years in the 1960s. Since that time, however, it has remained at that point. It must be noted that many diseases that delayed the onset of ...

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...