speaking of the survival of the human race, as though it's in our own handss.. if figure the two-stranded DNA design has about reached it's limits of success or viability.

what's needed now, or in the near future, is a four-stranded DNA design. it'll leap=frog us into the future, and into galactic and inter-galactic space travel.

for all of us to survive on this Earth, it'd have to be at least four times larger than it is now. that's unreasonable. so reaching out into space, now that's an option.

breeding age females should remain protected at all costs. they are, afterall our future.

speaking of true challenges, just consider integrating the two-stranded DNA and the four-stranded DNA into a sustainable system. can it happen in our time?