- What we know about Polaris Dawn, SpaceX’s riskiest manned mission yet Euronews
- SpaceX set to launch Polaris Dawn crew on daring excursion into Earth’s radiation belts CNN
- Walking above the air: The awe-inspiring history of spacewalks BBC.com
- SpaceX’s Polaris Dawn astronauts will make a daring trek into Earth’s Van Allen radiation belt Space.com