Colonizing Mars may require humanity to tweak its DNA

space.com ^ | 19 May 2020 | Mike Wall

[BenLurkin]

Genetic enhancement may not be restricted to the pages of sci-fi novels for much longer. For example, scientists have already inserted genes from tardigrades — tiny, adorable and famously tough animals that can survive the vacuum of space — into human cells in the laboratory. The engineered cells exhibited a greater resistance to radiation than their normal counterparts...

Tardigrades and "extremophile" microbes, such as the radiation-resistant bacterium Deinococcus radiodurans, "are a great, basically natural reservoir of amazing traits and talents in biology," added Mason... "Maybe we use some of them."

Harnessing these traits might also someday allow astronauts to journey farther than Mars, out to some even more exotic and dangerous cosmic locales. For instance, a crewed journey to the Jupiter moon Europa, which harbors a huge ocean beneath its icy shell, is out of the question at the moment. In addition to being very cold, Europa lies in the heart of Jupiter's powerful radiation belts.

Genetic engineering almost certainly won't be restricted to pioneering astronauts and colonists. Recent advances in synthetic biology herald a future in which "designer microbes" help colonists establish a foothold on the Red Planet...

"These are some of the things that we can actually do to help us make things we need, help us make materials to build our habitats," she said. "And these are a lot of things that scientists are researching right now — to create these kinds of things for our trip to Mars."

Some researchers and exploration advocates have even suggested using designer microbes to terraform Mars, turning it into a world much more comfortable for humans. This possibility obviously raises big ethical questions, especially considering that Mars may have hosted life in the ancient past and might still host it today, in subsurface lakes or aquifers.

[hal ogen]

Uh...it is over 30 trillion +.