What is the minimum number of people necessary to repopulate the earth without interbreeding issues?
If nearly everyone on earth died for some reason. How many people would be needed to repopulate earth without any inbreeding effects?
How long will it be before the earth will not be able to sustain the human population? Can planet Earth sustain a human population of 100 billion? If we killed all the species on earth except the human race, what would happen to the climate? How would earth be different if humans had an average lifespan of 200 years? How many people can the Earth support while maintaining a clean, green ecosystem? Did we humans ever come close to an event that would cause mass extinction of life on Earth, natural or man-made? Is the total number of living organisms on Earth going up or down? What factors affect it? What if we weren't the original people of earth and we killed off a race to have earth? How many human beings have lived on this Earth since the beginning of the time? How many people lived on earth? What would happen if the entire population on earth suddenly turned vegetarian? If wiping out human existence would save planet earth, and not doing so would lead to its complete destruction, should we do it? How long can earth sustain humanity? Will the Earth ever die? How will the earth die? If we left earth, would we bring egg cells of every animal? How many humans have been born on planet earth since the beginning of time? If extra terrestrials attacked the Earth would humans stand a chance of repelling them? With the human race ecologically dominating the earth, have we altered the evolution of other species? How many people was the earth "designed" to support? Will earth break if all people on earth jump at the same time? What will be the scenario if humans disappear from earth? Will Earth always be habitable for us humans? Could humans continue to thrive without other animals? Will earth become uninhabitable before humans are extinct or will we become extinct because earth will be uninhabitable? After an apocalypse how many pairs of fertile humans would be needed for human race to revive? How many people in the world die per day from avoidable causes? How much better off would the world be without humans? Why other species on the earth have not evolved as human? What will happen if each and every person living on earth turns vegetarian?