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NASA Sends an Identical Twin to Space to See What Changes Would Happen

at 4:34 pm | By

Seeing Double

Twins are a rare and wonderful thing.

Just imagine having a total duplicate of you roaming around. While all of us are unique, twins are always in this adventure called life together.

But aside from the double takes and pranks that only identical twins can pull off, what else can we learn from them?

Now-retired NASA astronaut Scott Kelly and his twin brother Mark Kelly became part of one of the coolest experiments NASA has ever carried out when Scott began his famous #YearInSpace trip back in March of 2015. The only siblings to have traveled in space, Scott and Mark were the perfect test subjects to compare the effects a year in space has on a human body as compared to a normal year on Earth.

The results are in, and this test was seriously fascinating.

nasa twin study logo scott kelly mark

Source: NASA

These were the biggest differences
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