Study: Active, Seafloor Hydrothermal Systems on Small Ocean Worlds Could Support Life
26 Jun
Top Stories

Study: Active, Seafloor Hydrothermal Systems on Small Ocean Worlds Could Support Life

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Top Stories Tamfitronics Ocean worlds are planetary bodies that have a liquid ocean, often under an icy shell or within the rocky interior. In our own Solar System, several moons of Jupiter and Saturn are ocean worlds. Some ocean worlds are thought to have hydrothermal circulation, where water, rocks, and heat combine to drive fluids in and out of the seafloor. Hydrothermal circulation would impact the chemistry of the water and rock of ocean worlds, and could help life to develop deep below the icy surface. In a new study, planetary researchers used computer simulations of hydrothermal circulation, based on a well-understood system on Earth, to measure the influence of lower gravity at values appropriate for ocean worlds smaller than our home planet. The simulations with ocean world (lower) gravity result in fluid circulation much...
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Astrobiologists Identify Five Greenhouse Gases that Would Be Giveaways of Terraformed Exoplanet
26 Jun
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Astrobiologists Identify Five Greenhouse Gases that Would Be Giveaways of Terraformed Exoplanet

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Top Stories Tamfitronics The five artificial greenhouse gases identified by University of California, Riverside astrobiologist Edward Schwieterman and his colleagues would be detectable even at relatively low concentrations in the atmospheres of exoplanets using the NASA/ESA/CSA James Webb Space Telescope and future space-based telescopes.An illustration of various planetary technosignatures, including artificial atmospheric gases. Image credit: Sohail Wasif / UC Riverside.“For us, these gases are bad because we don’t want to increase warming,” Dr. Schwieterman said.“But they’d be good for a civilization that perhaps wanted to forestall an impending ice age or terraform an otherwise-uninhabitable planet in their system, as humans have proposed for Mars.”“Since these gases are not known to occur in significant quantities in nature, they must be manufactured.”“Finding them, therefore, would be a sign of intelligent, technology-using life forms. Such signs are called...
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How Positive Engagement Can Bring the Exhausted Majority Back Into Politics
26 Jun
Politics

How Positive Engagement Can Bring the Exhausted Majority Back Into Politics

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Politics tamfitronics By Sami Sage and Emily Amick With only months to go before a redo of the 2020 presidential election, which offers two candidates many Americans are apathetic about, finding ways to reinvigorate civic engagement is essential. The national conversation often emphasizes how polarized society is, and how it's just getting worse. The most extreme voices on opposite ends of the spectrum get the most attention. Yet—as authors Sami Sage, of Betches Media and the Morning Announcements podcast, and Emily Amick, creator of @EmilyinYourPhone and former counsel to Senate Majority Leader Chuck Schumer, discuss in their new book, Democracy in Retrograde(Gallery Books)—the vast majority of Americans are part of the exhausted majority. They're just too tired of the contentious discourse and would rather avoid the fray. But,...
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Feeling Exhausted by US Politics? You’re in the Majority, Authors Say
26 Jun
Politics

Feeling Exhausted by US Politics? You’re in the Majority, Authors Say

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Politics tamfitronics Are Americans really as polarized as it seems? Authors Sami Sage of Betches Media and the Morning Announcements podcast and Emily Amick, creator of @EmilyinYourPhone and former counsel to Senate Majority Leader Chuck Schumersay not exactly. They connected on social media after the January 6 attack on the Capitol, and their collaboration resulted in their new book, Democracy in Retrograde (Gallery Books). Sage and Amick found that most Americans are part of the (very vocal) minority on the margins, but are rather an "exhausted majority," who have opted out of politics. Their solution? Civic engagement. Here, the authors discuss easy ways to get into political participation, why it's important, whether they think Donald Trump's recent conviction will spark more engagement or encourage voter apathy, whether we should be hopeless about...
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