Scientists are peering inside the mechanisms of aging, tampering with the cellular makeup of our DNA, and imagining a world where death is cured like a disease. Are we entering a new age of immortality? Or is dying necessary for our race's survival?

Unless we can turn the planet's problems into solutions, humanity may be coming to an end. Scientists are unlocking the secrets of nature to tame the elements, harness energy, and even control life. Can we hack the planet to save humanity?

Every 17 minutes, someone is killed with a gun. It's a wave of violence that political debate can't seem to stop. Is this an epidemic that scientists can help cure? Could gun crime be a virus?