|Imagine sticking some bacteria in the freezer and taking them out millions of years later to find that they are still alive.|
That would be similar to what happened recently, when scientists brought eight-million-year-old microbes back to life—simply by thawing them.
The ancient bacteria were found frozen in the world's oldest known tracts of ice, the debris-covered glaciers of Antarctica.
"We think that they were pretty much locked in a frozen, inanimate state for that period of time," said lead study author Kay Bidle, a marine microbiologist at Rutgers University in New Brunswick, New Jersey.
It's also possible that some of the microbes were capable of maintaining their metabolism within tiny droplets of water suspended in the ice, Bidle said.
Bidle and colleagues retrieved and revived two samples of bacteria from the glacial ice. The first was a hundred thousand years old, and the second was around eight million years old.
The eight-million-year-old bacteria were alive, but barely.
Their genes were severely damaged from long exposure to cosmic radiation, which is higher at Earth's poles.
The radiation bombarded the bacteria's DNA with high-energy particles, which broke apart the DNA's chemical bonds and hacked it into shorter pieces.
Tuesday, August 7, 2007
Life-Forms "Resurrected" After Millennia in Ice
Science: Am I the only one who sees titles like the above and go that may not be a good idea? It is also possible I watched way too many sci-fi movies.