The space shuttle Endeavor is carrying the first cephalopod in space. Called Euprymna scolope or bobtail squid, the onboard passenger will be the subject of experiments to test the Transpermia Hypothesis, also known as exogenesis or panspermia.
We are talking about space aliens in the form of microorganisms imbedded in meteorites that came to Earth billions of years ago and seeded our planet. If life came to Earth aboard primitive rock ships, then linguists are likely to build big words from Latin building blocks: Hence the term lithopanspermia.
Yes, our ancestors may have come from Mars or Venus or other corner in space, found a hospitable home on Earth, and evolved into the flora and fauna we know today. Sound far-fetched? Not according recent analyses of space borne particles.
In 1996, a meteorite originating from Mars was shown to contain microscopic structures resembling earthly nanobacteria. Although debunked and ignored for years, David McKay of the Johnson Space Center reexamined the sample in 2009, using an electron microphotography technique not available in 1996, and found “strong evidence that life may have existed on ancient Mars" (source).Our stalwart cephalo-astronaut is not the only non-human inhabitant aboard the space shuttle Endeavor. Five strains of bacteria will be used to test the exogenesis theory, specifically whether or not Earth borne microbes can withstand extremes of temperature, zero gravity, and high levels of radiation in deep space.
In 2001, researchers from the University of Naples claim to have found live extraterrestrial bacteria inside a meteorite estimated to be over 4.5 billion years old. The scientists resurrected the organisms when they immersed their rock samples in growth medium. Similar to modern day Bacillus subtilis, they say, the DNA is unlike any found on Earth (source – bilingual English/Italian).
Earlier this year (March 2011), Richard Hoover of the NASA/Marshall Space Flight Center published this paper, Fossils of Cyanobacteria in CI1 Carbonaceous Meteorites.
For our high-flying squid, this experiment is about the beneficial bacteria that live inside the sea creature's body. Called Vibrio fischeri, these bioluminescent organisms generate light which give our squid the ability to outshine its own shadow and mask itself in water.
Previous experiments with microbes in space have shown that some bacteria turn nastier when subjected to extremes of temperatures and radiation. In 2007, for example, a Salmonella sample was three times more likely to kill their hosts after returning from a shuttle mission. Nasa wants to observe what happens to mutually beneficial microbes when altered in space. Will these bioluminescent bugs transform themselves from dim to high intensity?
Watch Octopus ink the aquarium and then turn supernova.
