Six years ago a NASA probe brought back
samples of alien life, but when it crash - landed the probe «infected» a large swathe of Mexico with seeds that grew into enormous creatures that look like octopi (that's plural for octopus) which walk on land.
McKay suggested that the Viking Mars lander may have inadvertently oxidized any evidence
of life it its
samples of Martian soil, proposed an expedition to gather
samples of water from the Saturn moon Enceladus, and offered a child - friendly analogy for how
alien life might differ from
life on Earth: «I could build a table out
of Lincoln logs and you could build a table out
of Legos: At the macroscopic scale they'd be the same — they'd both be tables; at the microscopic scale they'd be the same — they'd both be built from carbon atoms.
«If an
alien intelligence came to Earth looking for
life, they would probably get a
sample of sea water, loaded with virions.