See the age-old dance of death and life in this simulation of how the world's overall population is always changing.
A look at why birth rates vary so dramatically across states.
Contraception access remains vitally important.
Flagstaff, Arizona, had the highest share of new mothers that were unmarried and Cheyenne, Wyoming, had the lowest.
The screams of the newly born and grim silence of the dying is visualized in this statistical tango that's mesmerizing to watch.
What other factors influence which states have the highest teen birthrates?
Geographer Joel Kotkin says the bigger problem is low birth rates in developed countries