1. Messengers

In 2008, sightings of strange lights in the sky over Central Texas attract media attention and ridicule. New radar data supports eyewitnesses' claims.

2. Believers

In 1994, over 60 children at a Zimbabwe school claimed to have seen aliens. Years later, witnesses maintain their accounts, while others are skeptical.

4. Lights Over Fukushima

After the 2011 Fukushima nuclear disaster, survivors reported seeing bright lights above the power plant. For some, the event upholds a long-held belief.