In April 2008 a tumbling Soyuz capsule dropped like a stone in a ballistic reentry, crushing its commander under eight times normal gravity. Peggy Whitson crawled out, dusted herself off, and started figuring out how to get back to orbit. She would spend 695 days off the planet.

This deep dive digs into how a biochemist from rural Iowa dismantled the test-pilot archetype to become the ultimate space pioneer through scientific rigor and relentless curiosity.

• Why her DNA and biochemistry research made her essential to keeping humans alive in space
• Commanding an undersea lab as one of the most rigorous analogs for spaceflight
• The pyro-bolt failure that forced her capsule to reenter the wrong way at Mach 22
• Becoming the first woman and first non-pilot to lead the astronaut office, then returning to flight
• Bringing NASA’s institutional safety into commercial spaceflight and microgravity stem cell research