Venus Flower Basket

I have not written here for a while, as I have been at work, still thinking about Blackbird and some of the details of the story.  I thought it would be interesting to reveal some of where the ideas for the Matryoshka construction came from.  In the story, General Craig explains to his men that the stealth system of the Matryoshka shuttle came from research into the Venus Flower Basket sponge from deep sea.  Here is a brief comment concerning that, with the web citation at the end, just in case you get the bug to read more about this interesting organism:

Fiber-Optic Wonder

by Ruth Tenzer Feldman

Joanna Aizenberg, a scientist and one of Earth's most complex multicellular animals, entered a San Francisco store and encountered the elegant remains of Euplectella speciosa—a deep-sea sponge and one of Earth's simplest multicellular animals. Scientist and sponge might one day revolutionize fiber-optic cables, the thread weaving together our wired world.
Fiber-optic cables are basically bundled strands of optical fibers—filaments of glass and reflective cladding that transmit coded light. These fibers are crafted under high heat using expensive equipment. Because the fibers are not very flexible, the cable is hard to install and repair, and is prone to minute cracks.
The sponge Aizenberg encountered—called Venus's flower basket and other names—transmits light through resilient, flexible glass fibers made at sea temperature. Aizenberg and her colleagues aim to find out how.
Venus's flower basket is a type of hexactinellid or glass sponge whose skeleton is composed of needlelike spicules of silica. The sponge uses proteins to collect and arrange silica particles into hairlike glass fibers two to three inches long. Traces of sodium are added, making the glass fiber better able to conduct light. Organic material and concentric shells of glass encase the fibers for protection. According to Aizenberg, “You could tie [the fibers] in tight knots and, unlike commercial fiber, they would still not crack.”
This sponge lives in tropical waters and anchors itself to the ocean floor. It likely gathers luminescent (light-emitting) organisms and turns itself into a “fiber-optic lamp” to attract the plankton that it eats. Seeking protection from predators, other creatures live inside this cuplike sponge with a lattice top. Often, a mating pair of shrimp will swim in and remain for the rest of their lives.
As scientists like Aizenberg realize, connectivity means more than communication among humans. There's a sea of information to be learned when we connect with the unwired world as well.

http://www.eduplace.com/science/hmsc/6/f/cricket/ckt_6f172.shtml