If aliens wrap their planets in potent greenhouse gases like we do, we’d be able to tell. That’s according to a recent thought experiment in which scientists identified five “artificial” greenhouse gases that, if abundant enough, can be spotted in the atmospheres of certain exoplanets using existing technology, including the James Webb Space Telescope (JWST). […]
A few lucky folks have now had their skin kissed by the light of alien suns. That light was generated here on Earth, at the world’s first “stellar tanning salon,” which opened this week at the Festival of the Future in Munich, Germany. The salon’s lamps simulate the spectra of a variety of stars, from […]
Low-temperature hydrothermal vents could survive on the dark ocean floors of moons like Jupiter’s Europa for potentially billions of years, new computer simulations have shown, as astrobiologists strive to figure out whether these alien oceans could be habitable. Hydrothermal vents are both a source of chemical energy and heat, and are one of the possible […]
Warp Path In the 1990s, Mexican theoretical physicist Miguel Alcubierre proposed a new kind of hypothetical warp drive that would allow a spacecraft to travel faster than the speed of light. To pull off that seemingly physics-defying trick, this hypothetical drive would need to generate a wave that causes the fabric of space to expand […]
Quick facts Where is it? Tanezrouft Basin, the Sahara . [26.2089113, 2.27090884]. What’s in the photo? Exposed paleozoic rock folds and colorful salt pans. Which satellite took the photo? Landsat 8. When was it taken? Oct. 22, 2017. This 2017 satellite photo shows the abstract beauty of one of the world’s most terrifyingly hostile environments. […]
Nearly 20 years ago, the Cassini probe and its Huygens lander peeked under the hazy atmosphere of Saturn’s largest moon Titan and gave us our first glimpse of the moon’s familiarly strange surface. Cassini-Huygens found that noxious liquids like methane and ethane form a very Earthlike patchwork of streams, rivers, and even seas as large […]
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. What would be the ultimate solution to the energy problems of an advanced civilization? Renowned British American physicist Freeman Dyson theorized it would be a shell made up of mirrors or solar panels that completely […]
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A team of astronomers combed through a collection of odd stars that are candidates for Dyson spheres — artificial constructs designed by aliens to leech energy from stars. Instead, the scientists found, the weird stars are more likely to be “hot DOGs” — hot dust-obscured galaxies. In early 2024, astronomers combed through more than 5 […]
North Carolina lawmakers could require schools to allow families to appeal some short-term suspensions, after a high school student was suspended for saying in class that “illegal aliens” need green cards. Christian McGhee received national attention after he was suspended for three days for asking his English teacher at Central Davidson High School whether her […]
Dyson Near Astronomers have identified seven star systems in our galaxy that could potentially host a Dyson sphere — a hypothetical megastructure an alien civilization could build around a star or black hole to capture most of its power in the form of radiation. The concept, first proposed by theoretical physicist Freeman Dyson in 1960, could take […]
This article was originally published at The Conversation. The publication contributed the article to Space.com’s Expert Voices: Op-Ed & Insights. Michael Garrett is the Sir Bernard Lovell chair of Astrophysics and Director of Jodrell Bank Centre for Astrophysics, University of Manchester. Artificial intelligence (AI) has progressed at an astounding pace over the last few years. Some scientists are now […]