As humans explore other worlds, the colonies they develop may change over time. While the first settlements may rely on individuals, as the outposts grow more self-sustaining, families will likely become the colonists of choice, a panel of experts said.

“The socioeconomic origins of colonists are going to change over time,” science fiction author Charles E. Gannon told Space.com.

Earlier this year at Dragon Con in Atlanta, Gannon was part a panel of scientists and science communicators who discussed how future space colonies might look and act, and how such developments might affect the rest of humanity on Earth. Gannon was joined by nuclear physicist Ben Davis, forensic anthropologist Emily Finke, science teacher Lali DeRosier and moderator Kishore Hari, a self-described “professional nerd.” [NASA’s Wild Space Colony Concepts in Images].

Some end of year thoughts on what we can hope to expect over the next few decades in terms of pushing the envelope of space travel.

Thoughts on a few benchmark dates for pushing humanity offworld and beyond the solar system. Here are few estimates for when we should expect future milestones in our crewed voyages beyond low-Earth orbit and to Proxima Centauri b.