Monday, March 31, 2014

Mirror cleaning

Solar energy plants are usually in deserts, where lots of sand and dust blow around. So, here's a specialized truck that delicately cleans the mirrors. Cool. 
It takes trucks three days, or rather nights, to clean the 250,000 mirrors at one plant in the UAE. 


Sent from my iPhone

Tuesday, March 25, 2014

Time lapse of airline jet flights

The commentary describes the predominating flights at different times:
Commentary on this video describes the flights predominating:



Here's world airline flights animated:


Here's a nice representation on a sphere:


And here's when all flights dropped out of the sky on Sept 11.



Friday, March 21, 2014

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