As of now, they are both employed as elementary school teachers in Minnesota.

There’s something fascinating about conjoined twins. After all, many people have siblings they’re close with.

Most of us will probably never meet conjoined twins.(Interestingly, female twins have a much higher rate of live birth and survival than male twins.

Approximately 70 percent of all conjoined twins are girls.)The aspect of Abby and Brittany's story that is even more singularly compelling is that, unlike the dozens of TLC medical documentaries that take place in far flung regions of the world where access to modern medical care can be scarce at best, the Hensel sisters are, apart from that conjoined twin thing, archetypal Midwestern girls.

They're incredibly well coordinated with this set-up, able to walk with a smooth gait, dribble a basketball, and even ride a bike. 40 to 60 percent of them arrive stillborn; about 35 percent survive only one day.

The really mesmerizing thing is watching them type on a computer, as both girls' hands fly over the keys (millennials, ugh), but there's no verbal discussion of what they're writing. The overall survival rate of conjoined twins is between 5 and 25 percent.

Abby and Brittany are unique among conjoined twins.

Since they have two stomachs but one bladder do they have to pee all the time?

What if one had graduated high school but the other had failed all her classes?

Each has her own head, but they share most everything else: torso, pelvis, legs, internal organs, and reproductive organs.

However, each girl has her own spine, lungs, and stomach.