• 'Helical Engine' Concept Could Reach 99% the Speed of Light https://ntrs.nasa.gov/search.jsp?R=20190029657 9 comments 22/10/2019

• A New Propulsion System Proposed By A NASA Engineer That Achieves 99% Of Speed Of Light https://ntrs.nasa.gov/search.jsp?r=20190029657 155 comments 21/10/2019 technology
• NASA genius invents engine concept that travels at 99% the speed of light https://ntrs.nasa.gov/search.jsp?r=20190029657 12 comments 20/10/2019 science

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