Boomerang Technology

How did technologies help expand the first empires?
When the first arrivals came to Australia from Indonesia, they knew they had to hunt for survival. Thus, they have created primitive technologies for their hunting techniques. They have invented the Boomerang. Boomerangs were used as throwing sticks, designed to kill any prey. It was used to trap birds in nets raised on poles by throwing the boomerang in the air to unsettle birds. They have also developed axes with fixed handles which helped them to clear the forest for hunting, gathering, and living. They used axes to clear trees, split wood, trim branches, clear roots and open the forest canopy. This allowed sunlight to penetrate the forest which helped the growth of useful plant foods.
There were plenty of sea mammals and birds, fish, crustaceans, dugong, turtles, sharks, stingrays and about 40,000 different types of sea snakes. Moreover, there were over 5000 species of native plants, 460 species of birds, 110 species of mammals, and 225 species of freshwater. Early Australians have created primitive technologies for their hunting techniques. They have invented the boomerangs which were used to kill any prey and fixed handle axes to clear the forest for hunting. They have also invented fish books made from turtle and coconut shell, stone drills from marking fish books, sticks for digging yams, and harpoons with detachable heads for hunting turtles and sea mammals. They had so many resources that they did not need farming for
Unlike, early Australians, Chinese people deeply relied on farming. People settled along the Yellow River in the north and the Yangzi River in the south. Under the Zhou Dynasty, China began expanding the agrarian frontier inland. They built long canals to regulate the flow of the main rivers. Soon, both millet in the north and rice in the south were under widespread cultivation. The Yellow and Yangzi rivers had annual floods and extensive floodplains suitable for producing high agricultural yields and supporting dense populations. In the river basins of China, abundant food and the fact that communities were widely spread encouraged the development of localized agrarian cultures. Geography also played a huge role in ancient China. Geography isolated China, for the Himalayan Mountains and the Taklamakan and Gobi deserts, prevented large-scale migrations between East Asia and central Asia and also it made it hard for invaders to conquer