"Am I doing this right?"Funny Animal Photos
No Scales on a Crocodile's Head
Contrary to popular belief crocodiles don't have scales on their heads. They are just cracks in the thick skin on their skulls. The rest of the body does have scales. How the animal develops biologically is interesting. Each scale forms from a discrete scale primordium. For example, scales at similar points each side of the body are identical.
The deep lines on the head are unique to each crocodile, like a fingerprint. Indeed, the lines are not symmetrical. Now it is possible to identify young crocodiles without tagging, to follow their growth.
Having no primordia on a crocodile's head is functional. Mounds of skin build up and form an active memrocobrane. Receptors detect fine vibrations in water. This helps in hunting.
It has been hypothesised that fingerprints form in the same way as the "cracks" on the heads of crocodiles. This unregulated gene formation building on earlier skin development is probably the reason why identical twins have different fingerprints. The final shape of all creatures was believed to be totally preprogrammed by genes.
Genetics
Australian Truffle Industry at Risk
It may be hard to believe, but Tasmania has a thriving truffle industry. Perigord, the company that began truffle growing in Australia, has a trained team of dogs to search out the valuable product.
Something is damaging the crop. A beetle related to the European truffle beetle has appeared. Truffle beetles have not been studied to a great extent. Until now the fungus has been pest free. In Europe they are also destroyed by flies, gnats, and larvae. Because the European truffle has only been here for about thirty years, growing them was easy. The pests have found them and are attacking. It seems the local beetle likes them too. Moreover, the European snail has inadvertently been imported.
There is a problem in doing research to identify the culprits. Truffles must be dug up to be examined before they ripen. Once brought into the light at this early stage they are no good for the market. Using pesticides as is done in Europe would be very expensive. Few Australian producers are willing to come forward to assist the study, fearing financial loss.
Agriculture
Dog Explodes in Darwin
The Northern Territory Government is planning to build a housing estate across the road from an animal crematorium in Darwin. A dog exploded at the crematorium late one night.
Bystanders said a strong yellow glow could be seen emanating from the chimney. Apparently, The dog had not been defrosted properly. A nearby resident said it was not unusual for such things to happen at the crematorium.
Government officials said the housing zone will be completely separated from the light industrial area where the pet crematorium is situated. If people passing by can see unusual happenings already the distance between the operation and the new housing estate had better be a long way. On the other hand, the odd fireworks display never hurt anyone.
Bystanders said a strong yellow glow could be seen emanating from the chimney. Apparently, The dog had not been defrosted properly. A nearby resident said it was not unusual for such things to happen at the crematorium.
Government officials said the housing zone will be completely separated from the light industrial area where the pet crematorium is situated. If people passing by can see unusual happenings already the distance between the operation and the new housing estate had better be a long way. On the other hand, the odd fireworks display never hurt anyone.
Society
Humans Did Not Kill Off Megafauna
During the Middle-Late Pleistocene, one million to 10,000 years ago, more than 50 species of animal disappeared, the last to do so 46.4 thousand years from the present. The reason for the demise of the giant creatures is hotly debated. Some scientists claim that the spread of Man across the globe was the cause. This is suspect, however, because there were so few of them. Killing the odd animal would not have made a significant impact.
Many believe that the end date for megafauna is incorrect. As stated above, the theory that humans killed them off by definition means that people and animals lived side-by-side for a considerable time. Evidence in Australia certainly points to this - 13 species of large animals were here on human arrival. Moreover, the people mainly relied on subsistence strategies for food. Their weapons were not very efficient. A boomerang is highly inaccurate and the range of a spear is limited.
Megafauna died out over a long period of time, not all at a specific date. Species lingered on in many regions. Just assuming that humans killed them is a mistake and diverts from the discovery of why the large animals became extinct. This was a time of extremes in climate. Perhaps a series of wild swings in climate gradually reduced their number to the tipping point where reproduction did not take place.
Society
High Meat Consumption Blamed for Obesity - Questionable!
In the twentieth century Australia was dominant in swimming at international events. This was largely due to the high consumption of meat in the diet of Australians. As time went by other nations noticed this and their athletes ate more meat. Today, Even small island nations have access to reasonably priced beef, pork, lamb and poultry. Consequently, Australia's dominance has waned.
Despite consuming a lot of meat, Australians did not die at a young age. Indeed, longevity was extended. New research points to an increase in heart disease, obesity, cancer and diabetes that do tend to shorten life. An example was given of Hawaii where these diseases are rapidly increasing. Red meat is seen as the major cause.
This research has flaws. Higher red meat consumption cannot be directly linked to more "modern" maladies. It could be coincidence. No tests were done on the rising consumption of refined carbohydrates. The call for more vegetables in the diet will improve the situation, but only if less red meat and refined carbohydrates are consumed.
There is an indirect link between red meat consumption and more disease. The feeding of antibiotics to animals to improve body weight has impacted on humans. Antibiotics are not so effective in people generally. Some countries have banned this practice, but all nations need to do so. Overall, there is no evidence of antibiotics in animal feed leading to modern diseases. Control of infections is the biggest problem.
Society
New Illicit Drugs Are Frequently Created
The world is in crisis. Illegal drugs that permanently damage users are easily purchased online. Recent research shows that when those under 16 years of age take marijuana regularly, particularly the cultivated strong variety, they are irreparably set back for the rest of their lives. Schizophrenia, is common. Furthermore, There is up to 55 per cent reduction in memory recall and decision making skills. A problem not given much importance is lung disease from smoking marijuana.
Dangerous psychoactive drugs are being developed. They are very pure and untested on humans. Some are highly toxic. Because they are new there are no laws restricting their supply, so they can be openly sold in Australia. Buying drugs online is virtually anonymous. The law has limited mechanisms for checking sales.
Several new chemicals are combined into a very dangerous brew. Some normal antidepressants are also added. The affects of drug interaction is unknown. Products are not checked for consistency. A brand bought one week can be completely different the next. Being legal in the short time does not make "home produced" drugs safe. Users believe that the new drugs are created in Australia. This in really not the case. Most are developed in China and India. These producers are untrackable. They do not use local currency. Barter is commonly practised.
Despite the wide choice of drugs, cannabis is the preferred substance of abuse. It is easily ingested by smoking, but it has a very strong smell that lingers for a long time after use. Police know when a person has smoked the illegal substance when they smell it. The chances of being caught are high.
Society
Fossil Find Shines Light on an Ancient Whale
A fossil find in Victoria, Australia, throws light on the origin of baleen whales. The artifact is 25 million years old. It is the 45 cm long skull of Mammalodon colliveri. Information about it has remained open since its discovery in 1932.
Though it had teeth it spent its time sucking mud in the search for prey on the seafloor. A short, blunt snout made this possible. This type of feeding led to the filter method of modern whales. The baleen whale was only three meters long, a far cry from the monsters that followed. Its ancestors though were also very large.
Other fossils have been found in Torquay, Victoria, notably Janjucetus hunderi which was unique to the area. This region is believed to be the cradle of tiny whales. Some form of isolation must have occurred for this to happen.
Though it had teeth it spent its time sucking mud in the search for prey on the seafloor. A short, blunt snout made this possible. This type of feeding led to the filter method of modern whales. The baleen whale was only three meters long, a far cry from the monsters that followed. Its ancestors though were also very large.
Other fossils have been found in Torquay, Victoria, notably Janjucetus hunderi which was unique to the area. This region is believed to be the cradle of tiny whales. Some form of isolation must have occurred for this to happen.
Paleontology
Albert Einstein's Genius Was Due to His Unusual Brain
Albert Einstein wasn't only a genius her was a very odd human being. His brain shows peculiar differences from the norm; it had many more folds than the average person. This gave the brain a greater surface area. It is like using a larger computer to do calculations.
Upon his father's death in 1955, Thomas Einstein gave the pathologist permission to preserve the brain of Albert Einstein. It was photographed then dissected into 2,000 ultra-thin slices. The slices and slides of them were later distributed to researchers.
The brain had more neurons and glia cells, well outside of the normal range; pariental lobes were unusual in the pattern of ridges and grooves. Einstein only had a brain of average size. The area controlling the tongue and face was larger, as was the region that involves attention and planning. Overall, Einstein's brain was complex. Many people think in words. He said his thinking was like a physical activity.
If selection based on "healthy" genes had been practised Einstein would never have been born. The same could be said for other great people. Sir Winston Churchill, for example, led an odd life. He would drink whisky in the evening right into the early hours and seldom got out of bed before midday.
Science
Subscribe to:
Comments
(
Atom
)
