The 128 baby bobtail squid will be used as part of research into the effects of spaceflight on beneficial interactions between microbes and animals.https://www.bbc.com/news/science-environment-57339989
So why use squid instead of dogs, chimps, or other mammals?
The squid have an immune system which is similar to that of humans.
And their distinct lack of a spine makes them similar to most politicians, too. Very helpful for finding out what might happen if we decide to…