Open letter to Space Colonization Enthusiasts. It is natural for enthusiasts who are keen on space colonization to think we need no protection for Earth. After all settlers on Mars in science fiction stories rarely run into issues. Even when they find life on Mars, somehow it is never hazardous for Earth. However science fiction is a product of the author’s imagination and is never predictive. Even hard sci. fi. gets some things right and some things wrong. But we are in a world now where what used to be science fiction is becoming reality and it may not be quite as the visionaries saw it.

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. They want to return them some time around 2033. The chance of returning life on those mainly geological samples is low. The chance it is dangerous if returned is also likely low. To give an idea of the order of risk I use Margaret Race's analogy of a smoke alarm. The risk of a fire in your house is so low most people don't panic about it. But you still install smoke alarms just in case.

First for anyone who doesn't know about it, NASA are planning to return its Mars samples of rock and some dust / soil to biosafety level 4 facilities (BSL-4). The samples are in tubes on Mars. They want to return them some time around 2033.

I was astonished when I read NASA’s draft Environment Impact Statement for their mission to return samples from Mars. NASA are normally so reliable. Normally their work is well grounded in the best and most recent science, and they are also very open with the public, for instance sharing their images from Mars as soon as they receive them themselves.

But this was far from NASA’s usual standard, and full of mistakes.

Video:

This was potentially a good article by the BBC except that sadly it used an absurd click bait title and had several serious factual errors

This was an opportunity for the public to give your feedback to NASA about their Mars sample return mission plans - can submit your comments to NASA here as a public comment.

This is for their draft environmental impact statement which they plan to submit later this year.

My comment is here

. Comment Submitted by Robert Walker

Comments were open to 11:59 May 15, ET, 2022. They got 170 comments (with some duplication). I