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 1 year 9 months 3 weeks ago • 978 views • 2:32

On a hike looking for rare limestone endemic plants in Death Valley, we spotted the wreckage of a plane! After several hours of hiking and many interesting plants, we managed to scramble over to the wreck.... continue reading

posted by eric3579 2 years 2 weeks ago • 1,775 views • 5:01

NASA’s MAVEN (Mars Atmosphere and Volatile Evolution) spacecraft has discovered “layers” and “rifts” in the electrically charged part of the upper atmosphere (the ionosphere) of Mars. The phenomenon... continue reading

posted by eric3579 2 years 3 months 1 week ago • 335 views • 2:19

Here are a few quick yet informative stats about American's most famous bomber, the B-17 Flying Fortress. You'll also learn what the crews had to endure and all in under 2 minutes. Enjoy.

posted by Mordhaus 4 years 9 months 2 weeks ago • 47 views • 2:23

YouTube description: In the high-altitude city of La Paz, Bolivia, rates of heart problems dwarf those of cities at sea level. But an unexpected partnership between medicine and art is helping address... continue reading

posted by Aard Vark (oritteropo) 5 years 3 weeks ago • 60 views • 3:08

Videosifters are all smart of course, and that’s okay… From YT: There are now more than 7 billion human beings on Earth, and that got me wondering: How successful are we compared to other species?... continue reading

posted by Trancecoach 9 years 3 months 2 weeks ago • 37 views • 4:40