Astronauts returning from six-month ISS missions come home measurably taller because the spine’s intervertebral discs are thought to expand without gravity compressing them, a stretch of up to two inches that reverses within days of a child-sized hug back on Earth

Astronauts returning from six-month ISS missions come home measurably taller — up to two inches — because the spine's discs rehydrate and expand without gravity's daily compression. The stretch reverses within days of being back on Earth. The post Astronauts …