See photos of 'Octomom' Nadya Suleman's octuplets (and six older children) through the years, from babies to full blown teenagers, ahead of her documentary 'I Was Octomom'.

Black-and-white photos have their own nostalgic charm, but sometimes they can feel a little distant, like glimpses of a world ...

The search to find a vaccine to prevent polio took many years and countless experiments before the disease was eventually eradicated in the United States.