Eight-million-year-old bug is alive and growing

An 8-million-year-old bacterium that was extracted from the oldest known ice on Earth is now growing in a laboratory, claim researchers.

If confirmed, this means ancient bacteria and viruses will come back to life as ice melts due to global warming. This is nothing to worry about, say experts, because the process has been going on for billions of years and the bugs are unlikely to cause human disease.

If true, however, Falkowski's findings could considerably extend the record for the oldest DNA frozen in ice. Last month, a team of researchers led by Eske Willerslev of the University of Copenhagen in Denmark announced that they had recovered DNA from the Greenland ice sheet that was up to 800,000 years old.