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21st Century Tech Blog
Science, Technology and the Future
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Transportation
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Climate Change Science
The Earth’s Rate of Warming in the 21st Century is 0.2 Celsius per Decade
lenrosen4
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December 19, 2024
Environment
Will Viruses Aboard Lead to the Death of Cruise Lines? The Jury is Out
lenrosen4
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June 7, 2020
Energy/Industry
Gizmos & Gadgets Update: Rotor Sails Proving Their Worth After a Year of Testing
lenrosen4
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October 29, 2019
Climate Change Science
Trump Wants to Be Another Seward But Instead of Buying Alaska from Russia He Wants to Purchase Greenland from Denmark
lenrosen4
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August 16, 2019
Energy/Industry
Hybrid Propulsion Systems for Ships May Be One Answer to Reducing Greenhouse Gas Emissions Globally
lenrosen4
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August 8, 2019
Energy/Industry
Headlines: New Material May Lead to Faster Oil Spill Cleanups
lenrosen4
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March 8, 2014
1
Oceans
Transportation Update: Crewless Drone Ships in our Near Future?
lenrosen4
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December 31, 2013
0
Military
Religion, Technology and Science in the 21st Century – Part 3: How Islam Deals with Science and Technology
lenrosen4
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August 8, 2013
0
Agriculture
Climate Change Update: Three Environmental Challenges, Four Headlines
lenrosen4
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December 18, 2012
1
Air Transport Technology
Technology and War – Part 3: War’s Impact on Transportation Technology
lenrosen4
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October 29, 2012
2
Energy/Industry
Transportation Update: Bunker Fuels Getting Greener
lenrosen4
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August 22, 2012
0
Energy Conservation Technology
Transportation Update: New Marine Technologies Coming to Tanker and Cruise Fleets
lenrosen4
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July 19, 2012
0
Ships
Transportation Update: A Return to the Days of Sailing Ships the High-Tech Way
lenrosen4
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April 26, 2012
0
Climate Change Science
Transportation Update: Are Ice Bergs in the North Atlantic and Northwest and Northeast Passages Still a Threat
lenrosen4
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April 15, 2012
0
Ports
Transportation – Part 4: The Marine Challenge – Ships and Routes
lenrosen4
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October 4, 2011
1
Automobiles
Transportation – Part 1: Where We Will Go and on What in the 21st Century
lenrosen4
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September 23, 2011
2
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Science Without The Humanities In College Is Poor Education
April 14, 2025
