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Flame cutting
Science, Maths & Technology

Flame cutting

...energy of the oxygen stream. The pre-heating flame is usually oxy-acetylene, but other cheaper gases such as propane, or natural gas can be used. Oxygen purity should be >99.5% since a 1% decrease in purity increases consumption and decreases cutting speed by 25%. Cutting will not occur below 95% purity. Cutting speeds are very dependent on oxygen pressure and nozzle...
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Article 5 mins
Choosing a Cosmic Name
Science, Maths & Technology

Choosing a Cosmic Name

...energy through internal nuclear reactions, is just one rather average star among more than a hundred billion stars in our Milky Way galaxy. In turn, it is just one of hundreds of billions of galaxies distributed throughout the observable Universe. With so many objects, it is not surprising that only the most prominent have names and most are identified by various...
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Article 10 mins
Do whales use their heads to attack boats?
Nature & Environment

Do whales use their heads to attack boats?

...energy to protect the brain and skull when males use their heads as battering rams to compete over females. One reason this hypothesis is compelling is the great size difference between male and female whales. Sperm whales are the most sexually dimorphic of all cetaceans, with adult males reaching sizes three times larger than females. Among mammals, such size differences...
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Article 5 mins
A ‘disorder’ or just me? Life with bipolar
Health, Sports & Psychology

A ‘disorder’ or just me? Life with bipolar

...energy and wellbeing, confidence and euphoria develop into a reduced need for sleep, reduced inhibitions, overactivity, restlessness and agitation. This can lead to risk taking or extreme physical health problems due to lack of sleep, lack of food and dehydration. Severe manic episodes may also involve psychosis. This is when the person may hear, see, feel, smell, touch...
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Article 5 mins
How can nature help us meet the climate challenge in towns and cities?
Nature & Environment

How can nature help us meet the climate challenge in towns and cities?

...energy out of the sea during storm surges and stabilise the coast against erosion under rising sea levels. All of these show how nature-based solutions can help urban environments adapt to climate change. Other cities are looking at how their natural spaces can mitigate the extent of climate change. In Durban in South Africa, the city government has worked with scientists...
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Article 10 mins
What do volcanoes tell us about the possibility of life on Mars?
Science, Maths & Technology

What do volcanoes tell us about the possibility of life on Mars?

...energy to support microbial life of the kind that inhabits hot springson Earth. Given that the cones in this study are at least 200 million-year-old, they are unlikely to host life today, but they would be good targets to search for fossilised microbes with minimal risk of contaminating an active ecosystem. This article was originally published by The Conversation...
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Article 5 mins
From Astrobiology to Parliament
Science, Maths & Technology

From Astrobiology to Parliament

...energy and a fresher mind. I learned about meeting tough deadlines, untangling a complex topic and writing to a prescribed style and format. I also worked for a day at the Nuffield Foundation, including giving what they call a ‘lunch and learn’ talk about the work I’d done at POST, which started some new connections and links with new networks for me. I’ve never...
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Article 5 mins
How to find invisible black holes
Science, Maths & Technology

How to find invisible black holes

...energy X-ray and gamma ray radiation. We can detect this radiation and that’s how we know the black hole is there. [The light from a star is magnified when the black hole passes in front of it. This creates a distinctive peak in the lightcur] Figure 1: The light from a star is magnified when the black hole passes in front of it. This creates a distinctive peak in the...
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Article 10 mins