Attention Deficit Disorder Prosthetic Memory Program

Low Orbital Spider Webs

ADDPMP111

It has been observed that being in Earth’s orbit has an effect on the structure of spider webs in space.

Spider webs were spun in low earth orbit in 1973 aboard Skylab, involving two female European garden spiders (cross spiders) called Arabella and Anita, as part of an experiment on the Skylab 3 mission. The aim of the experiment was to test whether the two spiders would spin webs in space, and, if so, whether these webs would be the same as those that spiders produced on Earth. The experiment was a student project of Judy Miles of Lexington, Massachusetts.

After the launch on July 28, 1973, and entering Skylab, the spiders were released by astronaut Owen Garriott into a box that resembled a window frame. The spiders proceeded to construct their web while a camera took photographs and examined the spiders’ behavior in a zero-gravity environment. Both spiders took a long time to adapt to their weightless existence. However, after a day, Arabella spun the first web in the experimental cage, although it was initially incomplete.

The web was completed the following day. The crew members were prompted to expand the initial protocol. They fed and watered the spiders, giving them a house fly. The first web was removed on August 13 to allow the spider to construct a second web. At first, the spider failed to construct a new web. When given more water, it built a second web. This time, it was more elaborate than the first. Both spiders died during the mission, possibly from dehydration.

When scientists were given the opportunity to study the webs, they discovered that the space webs were finer than normal Earth webs, and although the patterns of the web were not totally dissimilar, variations were spotted, and there was a definite difference in the characteristics of the web. Additionally, while the webs were finer overall, the space web had variations in thickness in places: some places were slightly thinner, and others slightly thicker. This was unusual, because Earth webs have been observed to have uniform thickness.

Poetry on the Runway - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP602
Poetry on the Runway
Illegal Number - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP160
Illegal Number
Billboards System Error - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP444
Billboards System Error
The Pleasure Shock - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP280
The Pleasure Shock
Jho Low - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP226
Jho Low
Tempescope - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP328
Tempescope
Shape of the universe - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP178
Shape of the universe
Animalia Paradoxa - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP582
Animalia Paradoxa
The cone of plausibility - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP084
The cone of plausibility
Meltwater Channel - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP316
Meltwater Channel
Organisms Named After Famous People - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP424
Organisms Named After Famous People
San Siro - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP113
San Siro

You are using an outdated browser.
Please upgrade your browser to improve your experience.