What happens in space that causes the body to change? Learn about life in space from astronauts

Is the human body built for Mars? NASA’s studies on the International Space Station show we need to fix a few things before sending people to the Red Planet. Astronauts go into space with good vision and come back needing eyeglasses. Cognition and DNA expression could be affected for years. And then there’s the discomfort of living in a tight space with crewmates, depression, and separation from the people you love.

Space doctors are on the case. You’ll meet the first twin to spend a year in space, the woman who racked up three physically challenging spacewalks in between 320 days of confinement, and the cosmonaut who was temporarily stranded on space station Mir while the Soviet Union broke up underneath him. What are we learning about the human body?

As astronauts target moon missions and eventual landings on Mars, one of the major questions is how the human body will behave in “partial gravity.” How does the human body change on another world, as opposed to floating freely in microgravity? What can studies on Earth and in space tell us about planetary exploration? These questions will be important to the future of space exploration and to related studies of seniors and people with reduced mobility on Earth.

If you’ve seen astronauts returning to Earth you’ll have noticed that they have difficulty standing up because their muscles and bones have weakened. They also have problems with their vision, their sense of smell, and the bottoms of their feet. What happens in space that causes the human body to react and change?

“The authors’ down-to-earth explanations and vivid descriptions are a treat, and especially enlightening are Williams’s first-person accounts of being in space … This candid survey will delight armchair astronauts.” — Publishers Weekly

“Anecdotes from space flights and astronauts augment Williams’s firsthand experience, including Neil Armstrong’s experiences with Gemini 8 and from recent stents on the International Space Station. These research findings are intriguing and accessible, vivified by an undercurrent of energy and excitement. Why Am I Taller? is a fascinating science text about the effects of space travel on the human body.” — Foreword Reviews

“Space buffs will likely find this an intriguing and informative peek into the various ways that space travel affects the human body.” —Library Journal

“Why Am I Taller? is a comprehensive and contemporary romp through the clinical challenges of past and future space flight. It is the kind of book that results when two gifted authors merge their respective talents to bring otherworldly medical discoveries down to earth with insight and clarity. Williams and Howell’s fascination for matters of physiology, physics and future frontiers is clearly evident and serves to impart a sense of wonder throughout the book.” ­­— Robert Thirsk, former Canadian Space Agency astronaut

“Williams and Howell write simply and engagingly, never getting bogged up in excessively dry details and maintaining accessibility of the material throughout. And they sprinkle enough humor to hit the sweet spot and make it very enjoyable.” — books are life blog