Ancient Marsupial Found With Specialised Teeth for Eating Snails

Evidence of the existence of specialised ancient marsupials have been found in Australia. They had teeth that were "hammer-like" for crushing snail shells. Lizards living today in rain forests have similar teeth. They had premolars like the teeth in humans located between the molars and canines. Researchers could not determine at first what the strange teeth were used for. It was the first time that such teeth had been found in marsupials.

Like the Tasmanian tiger a marsupial which filled the role of native dog in Australia, so this marsupial more than 10 million years ago, lived in the niche that the pink-tongued skink holds today. This wet rain forest lizard is quite large, about 40 cm in length, so it's ancestor would have been a tough competitor.

The extinct marsupial became extinct when the weather changed in Australia and inland rain forests receded toward the coast. Lizards could survive in the new environment. The marsupial could not.

Riversleigh in northern Australia, a rich source of marsupial fossils, was where the find was made. Indication are that the marsupial was not plentiful even in prehistoric times because so few fossils of the animal have been found.

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Science

New Kind Human Found Which Challeges Darwinian Theory

A new find of human remains challenges Darwinian theory. Science was absolutely certain that for the past 80,000 or so years only humans and Neanderthals wandered the earth. First the "hobbit" on the island of Flores was found which showed that other hominids lived almost to the present time in remote parts of the world. Now a new human species has come to light in Mongolia. The DNA from a child's finger indicates a separate species. Denisova is the name given to the new humans after the region where it was found.

For many years it was believed animals with a different number of chromosomes could not interbreed. This premise is now brought into question. Neanderthal DNA has been identified in human DNA. This finding makes the discovery of our origins almost impossible. With no clear distinction between species how do you put them into categories?

Denisova and humans diverted from a common ancestor about a million years ago. Neanderthals and humans separated from their ancestor half a million years ago. If interbreeding was commonplace Man's history will be blurred. The offspring of parents from two types of hominids will carry traits from both variations. Finding remains of distinct species will be more difficult. For the most part, however, bones and fossils of different hominids are being found. Perhaps cross breeding was not the norm.

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Small Island Throws Up Large Bird

An Indonesian island is home to fossils of a giant stork. This is the little island where the tiny humanoid hobbit was found. It is a wonderful place for exploration and scientific discovery. Animals who lived there range from dwarf elephants to giant lizards and rats.

The giant stork lived on the island at about the same time Aboriginals populated Australia. A leg bone shows the 6 feet tall bird was a marabou stork weighing about 16 kilograms. It couldn't fly. Bones were found in the Liang Bua cave where skeletons of the hobbit were found.

These creature got to the island then became cut off from mainstream evolution. The island has never been joined to the primary landmass. Findings prove that the "island rule" is valid. This theory holds that animals trapped on a small island will change size in order to survive in particular niches. Large mammals become smaller and small warm blooded animals grow larger. The stork was originally quite small but with less competition it increased in size.

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