Red sprites, secondary jets and newly discovered green afterglow called "ghosts" triggered by red sprites. A dozen vibrant red sprites were recorded on this evening and only two events had the green afterglow.... continue reading

posted by newtboy 4 years 7 months 2 weeks ago • 985 views • 2:32

YouTube description: The history of the Earth from its formation to present day, covering major events throughout its 4-billion-year history. Estimates of average temperature, atmospheric composition,... continue reading

posted by Aard Vark (oritteropo) 5 years 1 month 3 weeks ago • 809 views • 11:36

Concrete's greatest weakness is its tensile strength, which can be less than 10% of its compressive strength. So, we often reinforce it to create a composite material strong against all types of stress.... continue reading

posted by Mordhaus 6 years 10 months 2 weeks ago • 362 views • 8:11

YouTube description: In Göttingen, Germany, there's a four-tonne steel ball that can be raised up a 14-metre tower -- and then dropped in less than two seconds, crashing back to earth. It makes tiny,... continue reading

posted by Aard Vark (oritteropo) 7 years 4 weeks ago • 726 views • 3:34

YT: A total eclipse of the sun is an awe-inspiring sight, but throughout history it has also inspired scientific research. Studying eclipses has led to discoveries about the composition of the sun, the... continue reading

posted by Fantomas 7 years 6 months 4 weeks ago • 46 views • 4:29

At YouTube Space New York, there's the Mixed Reality lab: a virtual reality setup using an HTC Vive, a third controller, and some fancy compositing equipment. It's brilliant, and I got to visit and look... continue reading

posted by Mordhaus 8 years 3 weeks ago • 104 views • 4:26

YouTube description: Foraminifera – tiny, single-celled marine life forms – build gorgeous houses that record how much ice there is on the planet. Special thanks to Professor Lee Kump of Penn... continue reading

posted by Aard Vark (oritteropo) 8 years 3 months ago • 489 views • 2:51

yT "COOPH explains 9 photo composition tips with the help of Steve McCurry's incredible photographs. Special thanks go to Steve McCurry for his time and permission to use his photographs in this video! "

posted by blackfox42 9 years 12 months ago • 326 views • 3:10

YouTube description: Make a beautiful colour changing liquid from cabbage juice, and explore the science of indicator solutions in this fun chemistry experiment for children. Download the infosheet... continue reading

posted by Aard Vark (oritteropo) 1 decade ago • 22 views • 3:56

In which the narrator shows how effective use of quadrants can make a movie scene come alive. It'll give you a different perpective on movies. "One of the many pleasures of Nicolas Winding Refn’s “Drive”... continue reading

posted by blacklotus90 1 decade 1 month 1 week ago • 66 views • 3:34

an explanation and demonstrations of the explosive welding process

posted by newtboy 1 decade 5 months 2 weeks ago • 401 views • 2:13