513 search results
An introduction to minerals and rocks under the microscope
Science, Maths & Technology

An introduction to minerals and rocks under the microscope

...sand grain on a beach?' and 'How can solid rocks bend into huge folds, or flow like a liquid over geological time?' Minerals and rocks are also, of course, natural resources that provide the inorganic raw materials for almost everything humans use. A good scientific understanding of their origins, occurrence and properties helps to maximise their potential benefits to...
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Level 2: Intermediate 8 hrs
The Lords against the gunboats: When the House of Lords took on Lord Palmerston
History & The Arts

The Lords against the gunboats: When the House of Lords took on Lord Palmerston

...sand-blind ignorance of the veriest rudiments of the science of diplomacy, such elaborate dullness and redundant folly, were perhaps never before heaped together within the compass of a single discussion. Beyond which, throughout the whole of these attacks upon the Greek policy of Lord Palmerston, and consequently by implication of Her Majesty's Government, the real...
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Article 5 mins
The history of soapmaking
History & The Arts

The history of soapmaking

...sand (as an abrasive) for cleansing. Ancient Roman legend has it that the word ‘soap’ is derived from Mount Sapo, where animals were sacrificed, and from where rainwater washed a mixture of melted animal fats (tallow, a foul-smelling substance also used to make candles) and wood ashes into the River Tiber below. There, the soapy mixture was found to be useful for...
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Article 10 mins
Murals in Belfast
OpenLearn Ireland

Murals in Belfast

...Sands, one of the hunger strikers]Although the onset of the ‘Troubles’ curtailed the civil rights movement’s reclaiming of public space through protest marches, the Nationalist/Republican community began to assert its control of public space visually through an explosion of mural painting. The main catalyst for change was the hunger strike of 1981 by Republican...
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Article 5 mins
Forensic science and fingerprints
Health, Sports & Psychology

Forensic science and fingerprints

...aluminium, Al; carbon, C; chlorine, Cl; copper, Cu; iron, Fe; hydrogen, H; nitrogen, N; sodium, Na; oxygen, O; and sulfur, S. Molecules: molecular and structural formulas Molecules are electrically neutral collections of atoms bound together in specific proportions. Each molecule has a particular geometric arrangement of atoms. One way of describing molecules is to use...
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Level 1: Introductory 10 hrs
The poetry of Sorley MacLean
History & The Arts

The poetry of Sorley MacLean

...sand and was green. Warne he says and wittan, the crow has no tree, I have the power to kiss you, I dwell in your ear. Tell him you do not want to listen – he comes, an otter, he comes swarming like hornets, he cries, a cricket, he grows with the marsh under your house, he whispers in the well, smordis you hear, your black alder will wither, and die at the fence...
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Level 3: Advanced 10 hrs
Are old voting machines a threat to democracy?
Science, Maths & Technology

Are old voting machines a threat to democracy?

...casting a ballot. Voting machine problems this November could lead to more long waits and lost votes: in March, we saw thousands of voters in Arizona wait in line for hours. Equally troubling is that aging machines can be difficult to maintain. In more than 40 states, jurisdictions use voting machines that are no longer manufactured. As these machines get older, parts...
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Article 5 mins
Why is it dangerous when Trump sees people as objects?
Languages

Why is it dangerous when Trump sees people as objects?

...cast his Federalist enemies as silent monuments, relegated to history. Jefferson’s belief in Enlightenment rationality meant that he thought even those who held differing opinions from him ought to be tolerated. Nonetheless, a silent monument can neither criticize nor consent. Defending the indefensible Fast forward 200 years, and we don’t have a founding father...
View article Why is it dangerous when Trump sees people as objects?
Article 5 mins