[p-e-w]

One thing that’s rarely discussed about spaceflight is that for the foreseeable future, it will have to happen without the animals that humans rely upon on Earth. I think this will expose just how strong that reliance is in some areas.

[totetsu]

I wonder about what happens to gut micro biomes

[thaumasiotes]

They'll standardize so that everybody has more or less the same stuff.