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Shooting Lasers Into A Campfire Produces A "Portal" Effect
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Class 3B vs Class 4 laser therapy penetration - YouTube
Everything you need to know about lasers (because people are pointing them at planes) - BBC News
Laser pointer - Wikipedia
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Laser Pointers | Environmental Health and Safety | Iowa State University
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Appendix F: Laser Hazard Warning, Danger and Notice Signs | Office of Environment, Health & Safety
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