Parth Shah

Where is the line between what is real and what is imaginary? It seems like an easy question to answer: if you can see it, hear it, or touch it, then it's real, right? But what if this way of thinking is limiting one of the greatest gifts of the mind? This week, we meet people who experience the invisible as real, and learn how they hone their imaginations to see the world with new eyes.

We all know the downsides of being poor. But what about the downsides of being rich? This week, we explore the psychology of scarcity...and excess.

The desire to find our tribe is universal. We like to know who we are and where we belong. This week, how this fascination has led to a thriving industry built on the sale of personality tests.

Roberta Cordano is the first Deaf woman to lead Gallaudet University, the world's only liberal arts university for the deaf and hard of hearing.

Skin tone is only part of the challenge for an oft-tattooed customer who wants to see herself reflected in the "human canvases" of tattoo artists.

Different skin tones call for different tattooing approaches. That can make things difficult on tattoo artists and their customers alike.

"Dwell time" is the amount of time visitors spend wandering through a museum. In most museums, that's around two hours. But in the newest Smithsonian, some visitors are there for as long as six.