Four volunteers will spend 45 days locked inside a 650-square-foot module at NASA's Johnson Space Center in Houston starting next month.
Why it matters: The experiment will mimic a Mars landing to help the space agency determine how astronauts will react to real-life scenarios in the safety of a simulated environment.
Former President Trump said in August he'd "gladly" release his medical records. But with less than three weeks to go until Election Day, his campaign has yet to release any basic health data.
