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      Your search returned 71 results

      Listed under:  Science  >  Scientific inquiry  >  Evaluation
      Video

      ABC News: 'Junk DNA' not junk after all

      • TLF-IDM017851

      Geneticists have long thought that 98 per cent of human DNA was 'junk' (or 'non-coding') DNA. However, recent scientific research suggests that there is much more to this DNA than first thought. Watch this clip to discover more.

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      Video

      Argo floats

      • TLF-IDM016590

      This minute video segment from Catalyst decade ago describes the Australian initiative, Argo, that has become a major international collaborative project to look at the world's oceans and help understand processes at depth - monitoring the pulse of the global heat balance and giving us vital information on the ocean's role ...

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      Video

      Atoms of Fire: Atoms and organic compounds

      • TLF-IDM017557

      Can you imagine someone who lived over 2400 years ago saying that all matter is made up of atoms? Democritus, an ancient Greek, did. Explore the history of this scientific idea with chemist Amanda Tilbury. Hear how Swedish scientist Jöns Berzelius postulated much later that only living tissue could make an organic compound ...

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      Video

      Atoms of Fire: Building models of organic molecules

      • TLF-IDM015487

      Have you seen the model of long-chain carbon molecules first developed by Friedrich August Kekulé? This model enabled chemists to make a great leap forward in their understanding of the structure of organic molecules. See how to represent the structure of methane, ethane, propane, butane and octane. Find out how to rearrange ...

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      Video

      Atoms of Fire: Vitalism disproved through evidence

      • TLF-IDM015488

      Discover how the scientific theory of vitalism, championed by the Swedish chemist Jöns Berzelius, was disproved by his former student Friedrich Wöhler. Find out the way chemists study how the different atoms in organic compounds combine in set ratios depending on the 'valence' of those atoms.

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      Video

      Can photons and atoms generate laser?

      • TLF-IDM019618

      Electrons around atoms can absorb and emit photons of particular colours of light – see three different atomic models explain what's going on.

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      Video

      Catalyst: Aboriginal fire knowledge reduces greenhouse gases

      • TLF-IDM015379

      Come on an eye-opening trip to Western Arnhem Land in northern Australia to find out how Aboriginal fire-control techniques are used to reduce greenhouse gas emissions by thousands of tonnes.On the trip you will also find out how exploding ping-pong balls are used to create low greenhouse gas firebreaks at the right time ...

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      Video

      Catalyst: Accelerating glaciers in Antarctica

      • TLF-IDM015381

      Discover a white world in which glaciers are racing toward the sea at seven times their normal speed. This is what is happening in Antarctica now and the consequences will eventually be felt at your nearest beach. Travel with scientist Dr Paul Williams to see some stunning images of what is occurring around the fringes ...

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      Video

      Catalyst: Climate and bushfires in Australia

      • TLF-IDM015380

      What can science tell us about the major cause of bushfires in Australia's past? How can it help us predict future bushfires? Two scientists discuss evidence related to bushfire regimes (bushfire patterns, types and intensity). Please note that this clip contains recent images of homes destroyed by fire that may disturb ...

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      Video

      Catalyst: Heat transfer: is it hot or cold?

      • TLF-IDM015774

      If you picked up a paper book and a metal box do you think one would feel colder to the touch or would they feel the same? Watch this clip to see if people's predictions about the temperature of objects match their observations. You may be as surprised as they are!

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      Video

      Catalyst: How will fire change the climate?

      • TLF-IDM021143

      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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      Video

      Catalyst: Large Hadron Collider discovery, 2012

      • TLF-IDM015514

      Have you heard of the Large Hadron Collider (LHC)? Watch this clip to find out about a scientific discovery at the LHC that left physicists uncharacteristically emotional. Catalyst's Dr Derek Muller takes you inside the LHC and talks to scientists there about the discovery of the Higgs boson and what it means for our understanding ...

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      Video

      Catalyst: Megafauna fossils

      • TLF-IDM017570

      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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      Video

      Catalyst: Plants and increased levels of carbon dioxide

      • TLF-IDM015385

      We know that most plants use carbon dioxide to make their own food. So what might plants look like in 100 years if carbon dioxide levels continue to increase - will they become enormous and overtake our backyards? View the possible effects of changes in atmospheric carbon dioxide on plants and, in turn, humans and other animals.

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      Video

      Catalyst: The home of Australian science

      • TLF-IDM015837

      Australia has a long and proud history of excellence in science. How should we celebrate this? Watch this clip to find out about an Australian organisation that recognises and promotes outstanding scientific achievement. You'll also find why its Canberra headquarters is referred to as 'the flying saucer'!

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      Video

      Catalyst: Thinning ice sheet

      • TLF-IDM015374

      Discover that that the massive ice sheet in East Antarctica has been losing mass since 2006 instead of growing, as was previously thought. Watch animations to see how scientists from NASA and Australia are using satellite technology and aerial monitoring to investigate the thickness of East Antarctica's ice sheet. Find ...

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      Video

      Catalyst: Tsunami prevention in the Pacific

      • TLF-IDM025356

      By investigating sediments and debris left by devastating tsunamis throughout history, Japanese scientists are making discoveries that change the way we understand disaster prevention in the Pacific. Watch as research teams examine rocks and mud layers; create digital simulations of past tsunamis; and investigate the seabed ...

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      Video

      Caving for fossils

      • TLF-IDM017571

      Imagine the enthusiasm of Australian paleontologists when they heard about the discovery of three caves in the middle of the Nullarbor Plain. Watch this clip to find out just what was discovered in the caves and why it is so significant.

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      Video

      Climate change and the rising sea level

      • TLF-IDM020675

      What is the correlation between global warming and the rising sea level? This animation explains the link between the two and the consequences of a continual sea level rise. How are some communities combating this problem? Can you think of some other ways we could address this problem?

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      Video

      Cloud seeding

      • TLF-IDM016406

      This nine and a half minute video segment from Catalyst describes how researchers from Monash University have hard evidence that cloud seeding can produce good amounts of extra rainfall. Data collected over a long period of time has give hope to scientists and environmentalists who are trying to reduce the impacts of droughts ...

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