Answer:
true
Explanation:
But radiation—high-energy electrons and protons, gamma rays, and X-rays—poses an immense threat to human health, too, especially on long space voyages. Short-term exposure to radiation can cause nausea and decreased blood counts. In the long term, exposure can cause cancer, cataracts, and death. And children whom astronauts conceive after flying in space may have a larger risk of birth defects.
