Agency says orbiting power stations would be costly, but rocketry breakthroughs could make it economical.
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Timing and Likelihood of the Origin of Life Derived from Post-Impact Highly Reducing Atmospheres.
Astrobiology
September 2024
Space Science Division, NASA Ames Research Center, Moffett Field, California, USA.
Big impacts on the early Earth would have created highly reducing atmospheres that generated molecules needed for the origin of life, such as nitriles. However, such impactors could have been followed by collisions that were sufficiently big to vaporize the ocean and destroy any pre-existing life. Thus, a post-impact-reducing atmosphere that gives rise to life needs to be followed by a lack of subsequent sterilizing impacts for life to persist.
View Article and Find Full Text PDFAgency says orbiting power stations would be costly, but rocketry breakthroughs could make it economical.
View Article and Find Full Text PDFConverging theoretical frameworks suggest a role and a therapeutic potential for spinal interoceptive pathways in major depressive disorder (MDD). Here, we aimed to evaluate the antidepressant effects and tolerability of transcutaneous spinal direct current stimulation (tsDCS) in MDD. This was a double-blind, randomized, sham-controlled, parallel group, pilot clinical trial in unmedicated adults with moderate MDD.
View Article and Find Full Text PDFExploring a model nuclear planning and response program: Evaluating public awareness of written risk and emergency.
J Emerg Manag
December 2021
Assistant Professor, Department of Mathematics, Arkansas Tech University, Russellville, Arkansas.
High-reliability organizations (HROs) including commercial airlines, the NASA Space Shuttle engineering team, US Naval aircraft carrier and nuclear submarine crews, and US nuclear power plants are relatively safe. However, these organizations experience system breakdowns often with catastrophic outcomes. This study focuses on risk information management strategies employed by a nuclear energy power plant located within 10 miles of a population center.
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- Potential climate change will negatively affect future crop yields, particularly for maize, soybean, and rice, with new projections showing significant declines in productivity.
- Previous models anticipated slight increases or minor declines, but updated simulations suggest much larger decreases for these crops.
- On the other hand, wheat is expected to see improved yields due to increased CO2 levels, with notable climate impacts emerging earlier than expected, before 2040 in key agricultural regions.
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