Water is made up of hydrogen and oxygen, so why aren’t we able to make like a fish and breathe underwater? Find out in this episode of BrainStuff.
Petroleum-rich Qatar is spearheading projects to tackle the problems facing desert communities worldwide; from energy to fresh water and food production. But does their expensive, high-tech solution make sense?
“Qatar in many ways is ground zero for a lot of the challenges we’re going to see in the century ahead”, argues US ex-pat Jonathan Smith, from the Qatar National Food Program. Soaring temperatures, swelling populations and minimal rainfall plague the otherwise booming nation. Now its leaders are pushing ambitious experiments like the Sahara Forest Project, transforming seawater and sunlight into fresh water, vegetables, electricity, biofuel and animal feed. “The techniques we’re developing here can be applied in many regions in the world”, the project scientists insist.
In this week’s edition of SciShow news, Hank Green brings you discoveries involving two of the most exotic substances on Earth — the world’s rarest element and the world’s oldest water. Two great tastes that taste great together? Stay tuned to find out.
Why do ice cubes float? How come some insects can skate across a pond while humans sink to the bottom? Educator Christina Kleinberg says these are both offshoots of polarity, caused by the way that two hydrogen atoms combine with one oxygen atom to form water molecules. She explains in an animated TEDEducation talk.