3,610 search results
How does earthquake science help us track North Korea's nuclear tests?
Science, Maths & Technology

How does earthquake science help us track North Korea's nuclear tests?

...work out with greater accuracy where the waves originally come from. In 1996, the Comprehensive Test Ban Treaty (CTBT) was opened for signatures, aiming to ban all nuclear explosions. To enforce this treaty, the Vienna-based CTBT Organisation is establishing an International Monitoring System with over 50 seismic monitoring stations to detect nuclear tests anywhere on...
View article How does earthquake science help us track North Korea's nuclear tests?
Article 5 mins
Sea level rise in Tuvalu, South Pacific
Nature & Environment

Sea level rise in Tuvalu, South Pacific

...worked hard to highlight the need for action on climate change. [People in the sea in Tuvalu, holding up a banner] An awareness event about climate change The ASIS (Alliance for Small Island States) has been arguing that there should be urgent international action to mitigate climate change. Mitigation of climate change could be achieved by the reduction of greenhouse gas...
View article Sea level rise in Tuvalu, South Pacific
Article 5 mins
What danger do asteroids pose to life on earth?
Science, Maths & Technology

What danger do asteroids pose to life on earth?

...work, shocked to see the dark February morning lit by something originally thought to be a missile. The rock exploded in the atmosphere, with many meteorite fragments scattered across the region. The largest piece, of about 600kg, was recovered several months later in an ice-covered lake. Although many people were hurt when the object powered its way through the...
View article What danger do asteroids pose to life on earth?
Article 5 mins
Plasma nitriding/carburising
Science, Maths & Technology

Plasma nitriding/carburising

...Work is held at a negative potential of 400–800 V with respect to the chamber. Operating temperatures up to 1050°C, but usually below 950°C. Carbon source is hydrocarbon gas (methane or propane), often diluted with nitrogen, hydrogen and argon, which is bled into the vacuum chamber at a few litres per minute. Very little exhaust gas results, hence no risk of...
View article Plasma nitriding/carburising
Article 10 mins
Dydd Gŵyl Dewi a rôl y dorf mewn canfyddiadau o hunaniaeth gerddorol Gymreig
History & The Arts

Dydd Gŵyl Dewi a rôl y dorf mewn canfyddiadau o hunaniaeth gerddorol Gymreig

...haddasu, ar eu newydd wedd, i fod yn addas i gyd-destunau cyfoes. Darllenwch yr erthygl yma yn Saesneg | Read this article in English Awydd ymchwilio ymhellach? Dr Helen Barlow - Progress and tradition: listening to the singing of the Welsh c. 1870 to c. 1920 Dr Helen Barlow - ‘Praise the Lord! We are a musical nation’: the Welsh working classes and religious singing...
View article Dydd Gŵyl Dewi a rôl y dorf mewn canfyddiadau o hunaniaeth gerddorol Gymreig
Article 5 mins
Averages
Science, Maths & Technology

Averages

...working in the same office. The numbers of children each of us has are 0, 2, 4 and 2. The mean number of children per person is the number we’d each have if they were divided out evenly between the four of us. In total there are 8 children, so the mean number is 8 divided by 4 - which is, of course, 2. What happens if a new colleague joins us, and the new colleague has...
View article Averages
Article 5 mins
Astronomers think they’ve just spotted an ‘invisible’ black hole for the first time
Science, Maths & Technology

Astronomers think they’ve just spotted an ‘invisible’ black hole for the first time

...work, and that’s where the second type of gravitational lensing observations came in. The authors repeatedly took images with Hubble for six years, measuring how far the star appeared to move as its light was deflected. Eventually this let them calculate the mass and distance of the object which caused the lensing effect. They found it was about seven times the mass of...
View article Astronomers think they’ve just spotted an ‘invisible’ black hole for the first time
Article 11 hrs 27 mins
Roman cookery
History & The Arts

Roman cookery

...working in the temples. There is even a story of a slave boy who ran away as he couldn’t face any more of the sweet dish. Roman cooking was traditionally highly flavoured and they used many spices we would consider strange today. Sally also brings along a garlic cheese spread – a very strong paste made with 50 cloves of garlic to every pound of cheese. Food was very...
View activity Roman cookery
Activity 10 mins