What is déjà vu?

You might have felt it -- the feeling that you've experienced something before, but, in reality, the experience is brand new. There are over 40 theories that attempt to explain the phenomenon of déjà vu. Michael Molina explains how neuroimaging and cognitive psychology have narrowed down the theories that could explain that feeling you're having...again.

Answer the following questions:

1. Why haven't scientists been able to definitively explain the phenomenon of déjà vu?

2. How can a fragment of memory summon up a moment from the past?

3. How is the Dual Processing theory different than the Divided Attention theory?

Record a 1 minute video recommending this pill.