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Catalyst: Probability and the birthday paradox

Even when a maths problem seems simple – for example, the chance of two people sharing a birthday – the maths can run counter to our human intuition. Mathematician Lily Serna poses a maths problem to the Clovelly Bowling Club: how many people do you need to gather to get a 50 per cent chance of any two people in that group ...

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Catalyst: Advances in nuclear power technology

Imagine our world if nuclear power generation could be made safer. Discover how Chinese scientists have developed a new nuclear reactor that reduces the chances of the reactor overheating to the point of meltdown. To do this the pebble bed reactor uses advances in technology to replace the traditional water-cooled system. ...

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Can We Help?: Efficient speech: the process of language change

Wassup, bro?Well 'pparently I ain't speakin' right.Will thou ha' the truth on't?We often think that only young people speak in abbreviated forms, but the truth is people have been doing this since Anglo-Saxon times! In this clip discover with Professor Kate Burridge some words that belong to the 'zero plurals' group, why ...

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ABC News Dr Karl discusses the Earths heat video

Discover the activities deep within the Earth that could seriously impact life on Earth far into the future. Watch this video to find out about the sources of the Earth's own heat. Dr Karl explains clearly just what is below the Earth's surface and what is happening there. As well, he talks about changes in the Sun and ...

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ABC News: Supporting sustainable farming

Consider the vast land that is Australia. How might we, as a community, help to keep our land sustainable? Explore the ideas put forward by Professor Peter Cullen and Dr John Williams in response to the continuing drought conditions of 2003. What role could city dwellers play so that farmers could better care for the land?

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Four Corners: Fire management strategies

What role do fire-behaviour specialists and ecologists have in fire management? Watch this clip to find out about issues relating to fire management in Australia, in particular prescribed burning.

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This Place: Burringurrah - the boy who ran from initiation

Charlie Snowball tells the story of Burringurrah, a landform named after a boy who ran away from tribal initiation. Also known as Mount Augustus, Burringurrah in Western Australia is often claimed to be the world’s largest rock. What other significant rock features is Australia known for?

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Catalyst: Water through cracked soil

Watch scientists investigate water movement through soil that has been cracked by drought. Australian scientists demonstrate a new way to investigate how water moves through the cracks using electrical probes to measure soil moisture at different soil depths. This technology could help farmers more efficiently irrigate ...

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Why Australia wanted a White Australia policy

The Immigration Restriction Act of 1901 was designed to limit non-British immigration to Australia. It came to be known as the White Australia policy. In some quarters, people of non-British (and especially non-European) heritage were regarded as being inferior, greedy or unable to fit in with dominant Australian society. ...

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Catalyst: Turning stormwater into groundwater

Imagine how much your life would change if your water supply ran out. Yet, when it rains, so much water is lost as it runs into stormwater drains. Watch as scientists talk about re-directing stormwater to recharge a groundwater aquifer. Listen as they describe how they can use a natural system to remove contaminants from ...

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Catalyst: Waves supply nutrients to marine ecosystems

Dive through the marine kelp forests off Australia's western coast and discover how ocean waves help cycle nutrients to sustain the plants and kelp forests of marine ecosystems.

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Catalyst: Volcanic eruptions at Mount Ruapehu

Imagine a volcano erupting kilometres away. You are afraid, worried for the safety of yourself and others. Paul Willis presents the work of New Zealand volcanologists conducting research at Mount Ruapehu, a volcano with a history of devastating lahar (water, sediment and rocks) flows. Learn more about lahar flows and the ...

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Catalyst: Supercapacitors: new battery technology

Discover how nanotechnology is contributing to the creation of new, improved batteries that may soon be used in all our mobile phones and portable music devices - even in cars and trams. Catalyst's Tanya Ha looks at how traditional batteries produce electricity and how their efficiency may be increased by tiny devices known ...

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Catalyst: Do heavier things fall faster?

Will a medicine ball or a basketball hit the ground first when dropped at the same time from the same height? In this clip, Catalyst's Dr Derek Muller investigates what influences the speed at which objects fall. Derek challenges some people in a market to make a prediction and explain their thinking, before he finally ...

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Four Corners: Megafires

Are we approaching the 'age of megafires'? It might sound like something out of a sci-fi movie, but some scientists believe there is cause for concern. Watch this clip to find out how bushfires as we know them are changing. Discover why.

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Interviews With 10 Australian Authors, Ch 6: Gary Crew's Strange Objects

How do you use research in a fiction novel that is based on historical events? What is the real symbolism of the ring? Why should a writer have a ‘day job'? Listen to Gary Crew answer these questions about Strange Objects in this interview.

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River Valley Civilisations: Mesopotamia, the world's first civilisation

Considered the birthplace of human civilisation, Mesopotamia (present-day Iraq, and parts of Kuwait, Turkey and Syria) was situated in the fertile valley between the Tigris and Euphrates rivers. What do we know of this ancient civilisation? What characteristics did Mesopotamia have that made it a civilisation?

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Andy Griffiths on writing songs and stories

What's the difference between writing song lyrics and writing a story? Andy Griffiths thinks they are quite similar. Why does he think this? How important is rhythm in Andy's stories? Next time you write a story, try reading it out loud and listen for the rhythm of the words. Can you make your story's rhythm sound even better?

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Creating characters with Sally Rippin

Listen as Sally Rippin talks about how her characters come to life. What does she say about the link between the writer and the characters they create? Why does she say that imagination is like a muscle?

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Elliot and the Surfing Scientist: Picking up ice cubes with string

Imagine trying to pick up a slippery ice cube with just a piece of string. Watch the Surfing Scientist team demonstrate how it can be done, using a surprising additive.