Dance isn't just moving one's arms and legs, it's moving the space around them and extending beyond the limbs. That's according to Polaris Dance Theater's founding Director Robert Guitron, who hired quadruple amputee Kiera Brinkley in the fall of 2012.

Even though Kiera lost her hands and legs after a childhood illness, she still manages to move the space around her body in ways that fully limbed dancers cannot.

According to Spacial Dynamics Institute founder Jaimen McMillan, Kiera grew up using her "spacial" limbs, or the space her actual limbs would have filled. By initiating her movement from the periphery, she manages to do a variety of movements with surprising ease.

Uriah, born a month after Kiera fell ill, benefited from her sister's example and moves with equal grace. Watching them dance together is truly a remarkable experience. Their story is the subject of a documentary named after their duet "Soar." To learn more about the project and support their project visit Soar's Kickstarter campaign.