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Researchers have discovered never-before-seen types of crystal hidden in tiny grains of perfectly preserved meteorite dust. The dust was left behind by a massive space rock that exploded over Chelyabinsk, Russia, nine years ago.
Continue reading “Never-before-seen crystals found in perfectly preserved meteorite dust” »
Anything not forbidden is mandatory quote by TH white once and future king.
An exploration of the notion that extinction by unforeseen means is a solution to the Fermi Paradox and that all civilizations in the universe blunder into extinction without seeing it coming.
Continue reading “Fermi Paradox: The Great Filter is Near” »
A giant asteroidâs impact is considered the likely cause of the mass extinction of the dinosaurs almost 66 million years ago.
While there is no potential harm from an asteroid on the Earth at present, it is still important to keep our defense system ready in order to prevent catastrophic consequences such as impacts by deflecting trajectories of asteroids if one is ever discovered.
With this aim, NASA launched the Double Asteroid Redirection Test (DART) mission, the worldâs first planetary defense test mission, last November. DART is the first-ever mission dedicated to investigating and demonstrating one method of asteroid deflection by changing an asteroidâs motion in space through kinetic impact. In summary, it is to collide with an asteroid and deflect it from its orbit in order to provide valuable information for the development of such a planetary defense system.
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As ancient and vast as the Universe is, it seems like some alien race arose in the galaxy long before us, but who rose before them? What would the cosmos be like for the first civilization to arise, and what if it is us?
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Traveling far distances in space is difficult, but advances in jet propulsion and genetics are making it possible. Trace is joined by Dr. Kiki Sanford to discuss how by altering the genes in our own bodies, we can make ourselves more fit to survive on other planets!
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Continue reading “Can We Genetically Engineer Humans for Space?” »
One of the largest comets known is approaching our planet on the only trip through the inner solar system it will make during our lifetimes.
Five years ago, the Hubble Space Telescope spotted a large comet at the farthest distance ever, as it was approaching the sun from way out between the orbits of Saturn and Uranus. Now, that giant space snowball is coming in for its closest pass by Earth in just a few weeks.
Comet C/2017 K2 will be at its nearest point to us on its current swing through the inner solar system on July 14. Even at its closest, however, it will still be farther away from us than the average distance between Earth and Mars. This will likely make it difficult to see the comet without at least a small telescope, despite its substantial stature.
Climate change is already had a serious impact on global food production â from making food less nutritious to messing with the growing season of plants, to even pushing some crop species towards extinction. On top of that, the worldâs oceans are already stressed by overfishing, with over 70 percent of the worldâs fish stocks fully exploited, over-exploited, or depleted.
The combination of overuse and climate change could prove deadly for global food security. And by the time 2,300 rolls around, it will be too late to mitigate the impact of human activity on our food sources, both those on land and those under the sea.
Alex SharpThe world needs to be subsidising heat pumps for the poorer regions of the world, to keep people safe.
2 Replies.
Chris BartlettThatâs alarmist, while theyâre is global warming, thereâs little evidence that we are yet seeing extreme weather previously unseen in Earthâs history or even during human history.
Continue reading “Life will find a way: could scientists make Jurassic Park a reality?” »
In about 5 billion years, the Sun will leave the main sequence and become a red giant. Itâll expand and transform into a glowering, malevolent ball and consume and destroy Mercury, Venus, Earth, and probably Mars.
Can humanity survive the Sunâs red giant phase? Extraterrestrial Civilizations (ETCs) may have already faced this existential threat.
Could they have survived it by migrating to another star system without the use of spaceships?
Monitoring PHAs is a huge responsibility that requires a worldwide effort, including tracking, alerts, and disaster preparedness. Last year, over 100 participants from 18 countries (including NASA scientists and the NEOWISE mission) conducted an international exercise that simulated an encounter with an asteroid that made a close flyby to Earth. As NASA revealed in a recently-released study, the exercise was a complete success. The lessons learned could help avert real impacts in the near future or significantly limit the devastation one could cause.
The study, which appeared in the May 31 issue of The Planetary Science Journal (titled âApophis Planetary Defense Campaignâ), was conducted by the Planetary Defense Exercise Working Group and led by Vishnu Reddy â an Associate Professor at the University of Arizonaâs Lunar and Planetary Laboratory (LPI). The working group is made up of more than 100 participants from 18 countries and includes facilities like NASAâs Planetary Defense Coordination Office (PDCO), the ESA NEO Coordination Centre, the Russian Academy of Sciences, the Korea Astronomy and Space Science Institute (KASI), and many universities and research institutes worldwide.
As Reddy and his colleagues describe in the paper, the planetary defense exercise was the culmination of work that began in 2017, which was designed to test the operational readiness of our global planetary defense capabilities. The exercise was carried out with the support of NASAâs PDCO, the Minor Planet Center (MPC) â the internationally-recognized authority for monitoring the position and motion of small celestial bodies â and the International Asteroid Warning Network (IAWN). The exercise was named the Apophis Campaign since it coincided with the close approach of the NEO (99942) Apophis, which flew past Earth from December 2020 to March 2021.
