How often does a banknote change hands?

If you’ve ever received a rather tatty-looking banknote, you may have wondered how many hands it has passed through on its journey to your wallet, purse or pocket. Well, On Stride Financial has now worked out its journey by calculating the velocity of … Continued



Why does water expand when it freezes?

The molecules of most elements are more compact in their solid form than they are in their liquid state, but water is different. As you may know, each water molecule is made up of one oxygen atom with two hydrogen … Continued


HIV virus is becoming weaker and could lead to the end of AIDS

HIV, the human immunodeficiency virus that causes AIDS, is evolving and becoming less deadly, new research has revealed. When a person becomes infected with HIV, the virus attacks their immune system, and weakens their ability to fight infections and disease. It can rapidly mutate … Continued

Reconstructed neuronal connections in the brain. Thomas Schultz.

Monster telescope could unlock high-res images of the universe and brain

New imaging techniques could unlock secrets of the universe, as well as provide detailed information about the brain. A team of astrophysicists, engineers and computer scientists are conducting research to develop radio interferometric telescope arrays, instruments that record and correlate electromagnetic … Continued

Gecko found on rope in Antigua

Gecko-inspired gloves let you scale walls of glass

Being able to scale walls like Spider-Man has just gone from being comic-book fiction to an exciting reality. A newly developed synthetic adhesion system inspired by geckos has been created and tested, enabling a 70-kilogram (154-pound) human to scale a 3.6-metre (12-foot) pane … Continued


Woolly mammoths could be brought back from extinction

The discovery of a female mammoth carcass preserved in snow could allow biologists to bring the ancient creatures back from extinction. The mammoth, which scientists have nicknamed Buttercup, was found frozen in Siberia in May 2013, and carbon dating of her flesh has revealed that she … Continued


Why do women have a higher life expectancy than men?

Statistically women are expected to live, on average, four years longer than men. The traditional argument is that men take more risks. This idea has arisen from studies that show men are more likely to die in car accidents, and … Continued

A close-up shot of a can of beer

Why doesn’t alcohol freeze in the freezer?

The type of alcohol that people can drink is called ethanol and has a freezing point of -114°C, much lower than a domestic freezer can reach. However, ethanol is always mixed with water and other flavourings before being drunk and this … Continued


Cyborg cockroaches could help find survivors in disaster zones

Cockroaches are known for being hardy creatures, and now they could be put to work as assistants in dangerous disaster zones. Researchers at North Carolina State University have fitted cockroaches with electronic backpacks that could help them find survivors trapped in the rubble after an earthquake or building collapse. These cyborg … Continued


Is it possible to build a time machine?

So far it is only possible to travel forward in time, and only by fractions of a second. Imagine there are two identical twins; the first travels into space in a high-speed rocket, while the other remains on Earth. When the … Continued


Liquid metal in action

Watch how a a new method is being devised to control the energy of liquid metal. things get a little bit Terminator 2…


Artificial photosynthesis

A Find out Friday interview with Dr Michael (M.H.) Cheah and Prof. Fred (W.S.) Chow from the Research School of Biology at The Australian National University

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