When grown-up jellyfish love each other very much, they make huge numbers of teeny-tiny potato-shaped larvae. Those larvae grow into little polyps that cling to rocks and catch prey with their stinging... continue reading

posted by newtboy 1 year 3 weeks ago • 38 views • 4:39

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 8 months 1 week ago • 985 views • 2:32

YouTube description: Ahmed Darwish el Fakhouri spends his days surrounded by olive oil soap stacked up high—each precious bar waiting to be wrapped and sold after a drying out period of two to three... continue reading

posted by Aard Vark (oritteropo) 5 years 4 weeks ago • 351 views • 2:24

At the old hut site (the new one being temporarily cut off by flooding) I made lime mortar from the shells of rainforest snails by firing them in a kiln, slaking them in water, mixing them into lime putty.... continue reading

posted by Mordhaus 7 years 4 weeks ago • 408 views • 7:08

I built a natural draft furnace to test ideas about how hot a furnace could get without the use of bellows. Natural draft is the flow of air through a furnace due to rising hot air. The hot gasses in the... continue reading

posted by Mordhaus 7 years 5 months 1 week ago • 454 views • 5:46

I built this pottery kiln and some pottery from termite mound clay to test an alternative clay source to my usual one from the creek bank. I started by making a large grate from ordinary clay. It was just... continue reading

posted by Mordhaus 8 years 1 week ago • 420 views • 11:27

As urban populations continue to rise, innovators are looking beyond traditional farming as a way to feed everyone while having less impact on our land and water resources. Vertical farming is one solution... continue reading

posted by Mordhaus 8 years 9 months ago • 832 views • 3:38

YouTube description: I made a batch of charcoal using the mound method then stored it in baskets for later use. Charcoal is a fuel that burns hotter than the wood it's made from. This is because the... continue reading

posted by Aard Vark (oritteropo) 9 years 1 month 1 week ago • 1,004 views • 5:31

"What happens when you drop a perfectly balanced stack of balls? And how is the result like a supernova? The classic momentum transfer demonstration, at the next level..." From http://boingboing.net/2015/02/24/how-to-... continue reading

posted by ant 1 decade 1 month 1 week ago • 1,125 views • 3:34

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 1 decade 2 years 2 months ago • 40 views • 4:40