from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The theory that microorganisms or biochemical compounds from outer space are responsible for originating life on Earth and possibly in other parts of the universe where suitable atmospheric conditions exist.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The hypothesis that microorganisms may transmit life from outer space to habitable bodies; or the process of such transmission.
from the GNU version of the Collaborative International Dictionary of English
- n. The doctrine of the widespread distribution of germs, from which under favorable circumstances bacteria, vibrios, etc., may develop.
- n. The doctrine that all organisms must come from living parents; biogenesis; -- the opposite of
- n. The theory that life on earth originated from spores or germs that evolved elsewhere in the uiniverse; -- in contradistinction to the theory that life evolved on earth from inanimate matter. This theory, originally suggested by S. Arrhenius in 1907, is sometimes advanced by those who feel that the time required for evolution of life is too long for life to have evolved on Earth from inanimate matter.
from The Century Dictionary and Cyclopedia
- n. Same as panspermatism.
Keep in mind that "directed panspermia" is based on the idea that life will arise some place by natural means, then disperse from there.
I love this article in which Professor Chandra Wickramasinghe says that life was brought here to Earth by comets, a theory he jointly proposed called panspermia in which interstellar dust is partly organic in nature and in comets.
If Hoover's claims are true, his findings will support a theory called "panspermia."
You could have read it as a nod to the idea of panspermia, but to me it smacked of intelligent design and creationism.
To test this theory - called panspermia - Ruvkun and his colleagues have started a project called the Search for Extraterrestrial Genomes (SETG, as a play on SETI).
Scientists have speculated that life could have come to Earth from space - a notion called panspermia - since the
The fact that living organisms do survive in open space seems to support the idea of panspermia - life spreading from planet to another, or even between solar systems.
A few scientists support the idea of panspermia ( "all seed"), according to which life exist all over the universe, or the more moderate concept of exogenesis ( "outside origin") where life on Earth originated elsewhere, maybe in the form of extraterrestrial microbes brought here with meteorites.
"This certainly does not disprove the idea of panspermia," David Kring of the Lunar and Planetary Science Institute said.
This is true even if the so-called "panspermia" theory holds and both Earth and Mars may have been originally "seeded" by similar microorganisms or one planet may have been seeded by the other.