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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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ABC News: In the past: Christmas at a bush school

Discover how school children in the Australian bush celebrated Christmas more than 50 years ago. This silent clip shows school children putting on a Nativity play - a play that tells the Bible story of Jesus's birth. The students then have a Christmas party. The black-and-white footage was filmed near Parkes in 1961.

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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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Four Corners: Increasing threat of megafires

Many scientists believe we are already experiencing megafires and that they will continue to increase in the future. In this clip you will hear from Australian scientists at the forefront of fire research. Discover what they have to say about the causes, projections, and consequences of an increased megafire threat.

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For the Juniors: Why do cows make milk?

Have you ever wondered why cows make milk? In this clip you will learn the answer to this question. You will also see how cows are milked in a large dairy. Join Bill, a dairy farmer, as he tends to his herd of dairy cows.

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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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Changing ideas and discovering themes in stories

Have you ever started out with an idea for a story and later realised you wanted to change it? You're not the only one! In fact, changing your mind is all part of the process of writing. Listen as author Tony Wilson explains how the idea for his book 'The Cow Tripped over the Moon' changed over time. What was his initial ...

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Planning and writing

How do you write? Do you get an idea and jump right in and start writing, or do you plan and think about your idea before you start? Everyone has their own writing style that works for them. Watch Lili Wilkinson talk about how she writes, and the importance of editing and being flexible with your original plan.

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An eclipse of the Moon

The phases of the Moon and lunar eclipses occur due to the Moon's orbit of Earth, and its position in relation to both the Earth and the Sun. Watch this animation showing a model of the Moon's orbit, its phases and a lunar eclipse. Discover what a total lunar eclipse is and what causes the red colour of a 'blood moon'.

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BTN: Nuclear tests at Maralinga

Can you imagine nuclear bombs being exploded in Australia, over your home? Between 1953 and 1963, the Australian Government led by Robert Menzies allowed Britain to test nuclear bombs in the open air at sites in Australia. These sites included Maralinga in South Australia. It was the land of the Maralinga Tjarutja people ...

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Editing with Alice Pung

In addition to being a writer, Alice Pung has experience as an editor. What was the advice her own editor gave her when she started editing other people's work? Alice believes that good editors ask writers good questions. How else can editors help writers? Next time a friend or classmate asks you to give them feedback on ...

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What is Music?: What is a musical phrase?

Sometimes we come across musical phrases that catch on like wildfire. With every repetition, these phrases take on more meaning. Listen closely for this jazz lick that has appeared in many forms throughout music history. What other popular musical phrases can you think of? What meanings do they carry, and what could you ...

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Roman Times: Were ancient Romans slaves to fashion?

What clothing would you have worn to look cool in ancient Rome? Like people today, many ancient Romans felt that they had to follow the latest fashions. Find out why for many men tunics replaced togas, and that in some periods men wore beards and in other times they didn't. See what hairstyle options were available for ...

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Catalyst: Take the Phi Golden challenge

The golden ratio, Phi: fact or fallacy? What about the Fibonacci sequence? We are told this ratio and its cousin Fibonacci occur everywhere in nature. Let's see which of these claims stacks up when put to the test.

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Interviews With 10 Australian Authors, Ch 8: Experience colonial Australia with Tom Keneally

Thomas Keneally likes to put himself in the shoes of figures from history, whether it's as a member of the SS or an Indigenous man treated unjustly, and ask ‘What would I have done?' In this interview he discusses why he was drawn to the Jimmie Governor story and the significance of the looming Federation of Australia.

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How to Build Stories, Ep 4: Exploring genre and setting of your story

Every genre has different rules. But once you know them, you can choose which rules you want to break. Find out how you can mix and match genres to create unique, interesting stories!

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For good measure

If you had to measure the rain level for the whole globe, how would you go about it so you could have as accurate a reading as possible? Rain gauges are great for measuring rain in small areas, but why might they not be as good for measuring large areas? Watch this video to see how the Global Precipitation Measurement (GPM) ...

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Kindred spirits: dancing our identity

Who are we and where do we belong? What and who decides our identity? People often ask these questions, and some may seek to discover the answers to them. In his dance piece entitled 'ID', choreographer Stephen Page explores what makes us similar, what makes us different and what gives us a sense of belonging. The clip ...

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Odd and even numbers

Do you know what makes an odd number and what makes an even number? There are a few ways to test whether a number is odd or even. Find out about one method in this video, then see if you can discover at least one other method.