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How did change accelerate?

This 12 minute video is divided into two parts and presents an overview of the rapid development of the modern world. Part 1 presents reasons for the exponential growth in the world's population over the last 500 years including the development of global networks and commerce and the discovery of fossil fuel energy, which ...

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BTN: China's internal migration

For decades China has experienced a mass migration of people from rural to urban areas. This large-scale movement of people is putting pressure on the resources and facilities of cities such as Shanghai. Watch this clip, first broadcast in 1993, to find out the reasons for China's internal migration and the challenges it ...

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Lateline: City bound

China is experiencing rapid urbanisation. Rural workers are on the move, searching for new opportunities in China's largest cities. This process is fuelling China's economic growth and improving the wellbeing of its citizens. But is the rate of change too fast? Are there pitfalls on the road to prosperity?

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Atoms Alive: Cells and energy

Cells are like chemical factories. Discover the different ways cells get energy to carry out their daily operations. Learn about the different types of metabolic processes inside cells, such as those that break down molecules to release energy and those that assemble building blocks to make more complex components.

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Catalyst: Why plants are good for liveable cities

Central Park in Sydney was voted the world's best tall building. It is known for the plants in its beautiful vertical gardens which cover its surfaces, but did you know that the garden is not purely decorative? Watch this video to find out what other purpose the vertical garden has.

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Catalyst: What is a mega-region?

Population growth is one of the problems facing Australians cities. Dr Julian Bolleter from the Urban Design Research Centre at the University of Western Australia says creating mega-regions could be a potential solution. What is a mega-region? In order to create a mega-region, what must happen first?

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Communicating in the colonial era

Imagine if you were living in Sydney in the 1800s and awaiting news or packages from England. You see a ship approaching Sydney Harbour, but how do you know where this ship is coming from or what it is carrying? Find out in this video from Sydney Observatory!

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Catalyst: How will fire change the climate?

Considering the impact of a changing climate on the severity and frequency of fires is one thing, but how about the impact of fires on climate? Why does Professor David Bowman describe this scenario as a 'fire spiral'? What are the consequences of a world with fewer forests? As Professor Craig Allen explains, drought and ...

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Foreign Correspondent: Spawning dams, not fish, on the Mekong?

The Mekong is the largest freshwater fishery in the world; however, this may be about to change. Discover in this 2010 clip how migration of fish species along the lower Mekong may be impeded by the proposed construction of dams along this mighty river. Do the economic benefits of the dam outweigh the potential loss of ...

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What Greenland's ice tells us about climate change

Why is it so important to keep our eyes on Greenland's ice and what does it have to do with climate change science? Watch this short animation from NASA to find out!

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Sciencey: Five things you need to know about climate change

Find out how carbon dioxide makes the Earth warmer, how oceans store heat and the way we can see climate history in ice. What are the consequences of changes in the global climate? What can we do as individuals and communities to stop these negative changes?

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Sciencey: Will Australia have the last bees on Earth?

Bee populations around the world have started vanishing, in a process known as colony collapse disorder. Scientists have many ideas about what causes colony collapse, including one possible culprit: the varroa mite. Australia is one of the last places on Earth unaffected by varroa. Could this mean that Australia could have ...

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Measuring gravity

Did you know you can measure gravity? The more mass an object has, the more gravity it has, so by measuring the mass of something, you can figure out its gravity. Why do you think climate scientists may want these measurements? Watch this NASA animation to find out.

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Catalyst: How high will sea levels rise?

Much of the world’s population will eventually have to deal with the consequences of sea-level rise, but the question is: how high will the water get? Dr Graham Phillips investigates how scientists are turning to the distant past to predict the impact of rising sea levels. Watch scientists explore 120,000-year-old coastlines, ...

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Reforestation as a climate change strategy

This is a video about an agroforestry project to restore the tree cover of microwatersheds in the High Andes of Peru in which the Chumbivilcas community worked with the Food and Agriculture Organization (FAO) and the Millennium Development Goals Achievement Fund. Interviews with the local mayor and project officers emphasise ...

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Foreign Correspondent: Mesoamerican Reef threatened

The Mesoamerican Reef, just off the shore of Mexico's Yucatán Peninsula, is under major threat. Listen to oceanographer Roberto Iglesias-Prieto explain how untreated wastewater affects the underground river system and the reef.

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Catalyst: Megafauna fossils

Travel back in time in outback Australia and investigate the giant lumbering beasts of the past - the megafauna. Visit a fossil site in Cuddie Springs, New South Wales, where megafauna bones have been discovered. Explore the connection between Aboriginal peoples and megafauna, and theories for the extinction of Australia's ...

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The different faces of Indonesia

Journey through Indonesia, our most populous neighbour - a nation of contradictions. Through the images in this clip, discover more about the people and the land, including population size, living conditions, education, internal migration, natural disasters, land management and international aid. How does Indonesia differ ...

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Bali and Sumba: Paradise versus poverty

We all know the idyllic paradise called Bali, but have you ever heard of its poorer neighbour, the Indonesian island of Sumba, where the people struggle to grow food to eat? Watch this clip to learn about environmental conditions and agricultural challenges there. Find out also what people in Sumba are doing to prepare ...

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ABC 7.30: Where do we build next?

Like many Australian cities, Melbourne has been growing rapidly. This clip from 2012 investigates debates about where Melbourne's urban growth should occur. While inner city areas are slowly being redeveloped, the outer suburbs continue to sprawl and their residents battle some serious issues.