spider   3165

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Composite image of a spider building its web | FlowingData
"Christian Fröschlin combined 2,800 frames of a spider building its web for this composite image."
data  imagery  composite  spider  web  time 
9 days ago by danhon
utterly fascinating: This spider, named Kim, was trained to jump on command.

spider  from twitter_favs
10 days ago by dalcrose
Spiders Use Earth's Electric Field to Fly Hundreds of Miles - The Atlantic
"Spiders have no wings, but they can take to the air nonetheless. They’ll climb to an exposed point, raise their abdomens to the sky, extrude strands of silk, and float away. This behavior is called ballooning. It might carry spiders away from predators and competitors, or toward new lands with abundant resources. (..)
Every day, around 40,000 thunderstorms crackle around the world, collectively turning Earth’s atmosphere into a giant electrical circuit. The upper reaches of the atmosphere have a positive charge, and the planet’s surface has a negative one. Even on sunny days with cloudless skies, the air carries a voltage of around 100 volts for every meter above the ground. In foggy or stormy conditions, that gradient might increase to tens of thousands of volts per meter. Ballooning spiders operate within this planetary electric field."
spider  flight  electrostatic  air  silk  science  electricity 
13 days ago by gohai
Spiders Use Earth's Electric Field to Fly Hundreds of Miles - The Atlantic
Electrostatic charges in the air can and are sensed by spiders who spin long filaments during gentle breezes to fly, sometimes tens or even hundreds of miles. A pair of scientists recently proved that electrostatic charge alone is enough to buoy spider's silk. Previously it was thought that it was friction of the wind and silk that was solely responsible. It may be that the wind is more responsible for stretching out the silk and providing horizontal travel, while electric repulsion between the silk and the earth may be responsible for most lift.
spider  ballooning  electrostatic  flying 
14 days ago by brentfarwick
gajus/surgeon: Declarative DOM extraction expression evaluator. 👨‍⚕️
GitHub is where people build software. More than 27 million people use GitHub to discover, fork, and contribute to over 80 million projects.
scrape  javascript  crawl  nodejs  spider 
6 weeks ago by romanrandom

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