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Listed under:  Scientific inquiry  >  Theories
Video

'Junk DNA' not junk after all

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.

Interactive

Sound Uncovered - iTunes app

Explore the science of sound and our understanding of how we perceive sound in this engaging collection of videos, images, articles and interactives. Find out about how sound energy travels, how the body processes sound, people who use sound in their professions and activities, and changes in our scientific understanding ...

Video

Coral bleaching: threat to the Great Barrier Reef?

Scientist Dr Ove Hoegh-Guldberg describes the Great Barrier Reef as one of the most thrilling ecosystems on the planet. Discovering new things there makes him feel like a pioneer. In the early 1980s the sudden appearance of bleached coral was a mystery. Join Dr Ove Hoegh-Guldberg as he describes coral bleaching as a serious ...

Video

Vitalism disproved through evidence

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.

Video

Fighting infection with vaccines

Explore historical and modern efforts to battle human infectious diseases. Watch re-enactments of the experiments of Edward Jenner, who pioneered vaccination, and of Louis Pasteur's work showing how microbes cause infection. Peer down the microscope to see the microbial world that wreaks havoc on human health. Learn about ...

Video

Below Earth's crust

Imagine tunnelling deep, deep below the Earth's surface. What do you think you would find thousands of kilometres down? Watch this clip to find out what is inside the Earth, what it's made up of and how hot it is. Find out about earthquakes, volcanoes, and geysers, and how they help us to understand about the composition ...

Video

Genetics, inheritance and epilepsy

Explore genetics, the patterns of inheritance and disease-causing mutations. Find out about Gregor Mendel's historic pea-plant breeding experiments showing that traits are inherited in particular patterns. See how Australian scientists discovered the gene mutation responsible for a type of epilepsy.

Video

Accelerating glaciers in Antarctica

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 ...

Video

Arctic ice melting

What do you think might be causing the big sea ice melt in the Arctic? Is it a natural phenomenon or is something else occurring? Watch this short clip to find out what scientists think is happening to the ice in the Arctic.

Video

Lured by fossils

Dinosaur fossils capture the imagination of all kinds of people, leading some to a lifetime of research and theorising. Find out about the devotion of two families whose examination of Australia's fossil record has contributed to understanding the geology and evolution of life here.

Video

Building models of organic molecules

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 ...

Video

Large Hadron Collider discovery, 2012

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 ...

Video

How old is our Earth?

Have you ever thought about how old planet Earth is? Watch this clip to discover the age of the Earth, and the fast and slow changes that have been happening since its beginning. Find out about English scientist Charles Lyell and how his observations shaped our understanding of the Earth's geology today. The enormous scale ...

Video

Ancient fish out of water

See fossil evidence of the largest Devonian lobe-finned fish ever found. Known as the Age of the Fishes, the Devonian period marks an important time in the evolution of land animals. Find out why this fossil is an important find.

Video

Clouds, thunderstorms and climate change

Fly into a massive thunderstorm with pilots and scientists as they study how global warming could affect storms. Learn how changes in ice clouds due to climate change could provide clues to future weather patterns. See scientists capture data on the beginning of an unusual cyclone. This excerpt is from a documentary on ...

Video

When neutron stars collide

Using technologically advanced supercomputers, scientists have developed theories about the creation of black holes deep in outer space. Watch the computer simulation in this clip to see how the collision of two neutron stars produces a gamma ray burst and a new black hole. Discover that our continuing understanding of ...

Video

Polar explorer observes Arctic melt, 2009

An Australian polar explorer describes his experience and observations of the Arctic following a three-month expedition around Greenland. Onboard Greenpeace's MV 'Arctic Sunrise' in 2009, Eric Philips saw at firsthand the conditions of the ice in the Arctic. Listen as Eric describes the changes he has seen after many yearly ...

Video

Square Kilometre Array (SKA), 2011

Find out about Australia's super science project - the Square Kilometre Array (SKA). Listen to astronomy experts discuss Australia's bid to be the home of the world's first SKA (telescope). See the telescope Australian scientists built to demonstrate their technological capabilities and help secure the bid. Find out what ...

Video

Climate and bushfires in Australia

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 ...

Interactive

Charles Darwin - The Australian Connection

This is a multilayered website about Charles Darwin and his important scientific expedition aboard the HMS Begale that included a visit to Australia. The website has interactive sections on Darwin’s journey, understanding weather, using longitude, evolution timeline, and coral reefs. The home page has a series of short ...