Conjoined twins are a rare event in the world’s delivery rooms. They occur about once in every 50,000 births, but 40% are stillborn, and, curiously, 70% are female. Conjoined twins are always identical: the product of a single egg that for some unknown reason failed to divide fully into separate twins during the first three weeks of gestation. In the U.S. there are perhaps 40 live cases each year; ordinary identical twins are 400 times as common.

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My last hour:

Just spent 45 minutes watching the most incredible video about Abigail and Brittany Hensel, conjoined twins who are now 21 and gave an interview at 16 about their lives. They share one external body, yet have two heads, two spines, and two sets of everything internally, above the waist. They each control one leg and one arm and one sister cannot feel the sensation on the other’s arm or leg, yet they clap, walk, run, drive together without communicating.

The most amazing thing was watching them type an Email, I was thinking of me typing this right now and watched one girls’ hand control the keys with the other sisters’ hand on the other side of the keyboard doing the same, but they composed a completely legitimate email without even speaking, yet they have two independant brains, personalities and ways of thinking.

Why I look at these things I don’t know, but sometimes I spend hours researching things I just don’t know about. It’s so interesting.

I doubt you’ll be as intrigued as I was at 45 minutes of this video, but just in case you are: watch this!