451 search results
The environmental costs of Trump’s wall
Nature & Environment

The environmental costs of Trump’s wall

...solid than a metaphor for increased border surveillance, aided by technology, to keep illegal immigration under control. However, if a vast concrete wall really is built, and if it is as tall and impenetrable as Trump hopes, it will presumably last for thousands of years. This will have long-term ecological consequences. [A predicted heat map of the US-Mexico border for...
View article The environmental costs of Trump’s wall
Article 10 mins
What chemical compounds might be present in drinking water?
Science, Maths & Technology

What chemical compounds might be present in drinking water?

...Liquid ammonia is additionally a widely used non-aqueous solvent. Now watch Video 2 and answer the question following it. NARRATOR Liquid ammonia is a good polar solvent, rather like water. Using a mixture of dry ice and acetone, we can condense ammonia by cooling it below its boiling point of minus 33 degrees C. It was Sir Humphry Davy who, in 1807, first noticed that...
View course What chemical compounds might be present in drinking water?
Level 2: Intermediate 6 hrs
What are nerve agents - and what do they do?
Science, Maths & Technology

What are nerve agents - and what do they do?

...liquids (except VX, said to resemble engine oil). The concentration in the vapour at room temperature is lethal. The symptoms of poisoning come on quickly, and include chest tightening, difficulty in breathing, and very likely asphyxiation. Associated symptoms include vomiting and massive incontinence. Victims of the Tokyo subway attack were reported to be bringing up...
View article What are nerve agents - and what do they do?
Article 5 mins
What should I expect when I am nearing the end of my life?
Health, Sports & Psychology

What should I expect when I am nearing the end of my life?

...liquids. I would encourage people to ask their medical teams: ‘do I still need all these medications?’ Furthermore, in my role I aim to protect the person from futile, burdensome, invasive medical interventions. This includes a discussion (if not already had) about ‘do not attempt cardiopulmonary resuscitation’ (DNACPR). This is because, when a person is dying,...
View article What should I expect when I am nearing the end of my life?
Article 5 mins
Water: Managing the 1% in a climate changing world
Nature & Environment

Water: Managing the 1% in a climate changing world

...liquid fresh water. The almost invisible third sphere (just above the Florida panhandle) is fresh water in lakes and rivers. This approximates to the 1%. Globally, we now use 8 times more water than in 1900; an increase from 500 km3 to 4,000 km3. About 70% of this is for irrigation, about 22% for industry and about 8% for domestic use. But geographical distribution and...
View article Water: Managing the 1% in a climate changing world
Article 10 mins
Supporting sustainable and responsible space exploration
Science, Maths & Technology

Supporting sustainable and responsible space exploration

...liquid water, the main ingredient needed for life (as we know it) to exist. Vast oceans lie beneath the surface of the icy moons Europa and Enceladus; ideal conditions for the formation of hydrothermal vents like those deep beneath Earth’s oceans that might have harbored the reactions initiating the chemistry of life. In the past, space exploration missions were mainly...
View article Supporting sustainable and responsible space exploration
Article 10 mins
The ageing brain: 'use it or lose it'
Health, Sports & Psychology

The ageing brain: 'use it or lose it'

...liquids per day) and regular exercise, our metabolism will work at an optimal level. This will help our body and brain to cope better with changes that ageing brings. The famous motto that goes with ageing is: ‘Use it or lose it’. This is true about all physical functions as well as our brain functions. We do need to regularly exercise/train the functions we do not...
View article The ageing brain: 'use it or lose it'
Article 10 mins
Children’s perspectives on play
Education & Development

Children’s perspectives on play

...sang to her all the time. Even when she was in an incubator in hospital I sang to her. When she was crying and upset I would sing to help calm her. So she’s heard music a lot. She was very late to talk, late to do everything, in fact. Her language has only really taken off in the past few months. Previously to that, she wasn’t forming many words but she could sing the...
View course Children’s perspectives on play
Level 1: Introductory 5 hrs