
Fly & die —
This bio-drone might resemble a propeller-powered egg carton, but already the designers say it has the ability to fly into environmentally sensitive areas and leave almost no trace.

Made from a substance that combines mushroom fibres and cloned paper wasp spit, Lynn Rothschild, the NASA developer guiding students from Stanford-Brown-Spelman working on the project, says the drone could be made to disappear simply by crashing it into a stream or puddle.

The team grew cellulose "leather" to coat the fungal body of the flying craft and then covered the sheets with proteins sourced from the saliva of paper wasps -- a water resistant material that the insects use to cover their nests.

The team is working on perfecting the biodegradable drone and is studying how to build its sensors from modified E. coli bacteria, the bacteria most commonly found in the intestines of humans and animals.

The circuits are printed from silver nanoparticle ink in an effort to make the machine as biodegradable as possible.


