A new theory invokes the common rubber band in an attempt to explain dark energy, a mysterious force causing the universe to expand at an ever-increasing pace.

F inding time and space to work out can be a real challenge. But hey, ... Elastic bands, also known as resistance bands, are much more than just simple rubber strips.

NARRATOR: "Full Time Kid," with Mya. [giggling] Hi, I'm Mya. Today on "Full Time Kid," we'll be learning about rubber bands. Rubber bands are made from the rubber tree.