NASA - Do Listen To Public Concerns About Life In Samples From Mars - Your Plan Is Like Building Us A House With No Smoke Alarms
NASA are planning to return its Mars samples of rock and some dust / soil to biosafety level 4 facilities. That was fine in 2009. But the problem is that it doesn’t contain the very small microbes we now know exist called ultramicrobacteria which can get through a very tiny 0.1 micron nanopore and still be viable. The samples are in tubes on Mars.
Source: science20.com
