Earth /channels/taxonomy/term/4090/all en Astronomers capture radio signal from distant galaxy /channels/channels/news/astronomers-capture-radio-signal-distant-galaxy-344925 <p>How do stars form in distant galaxies? Astronomers have long been trying to answer this question by detecting radio signals emitted by nearby galaxies. However, these signals become weaker the further away a galaxy is from Earth, making it difficult for current radio telescopes to pick up.</p> Mon, 16 Jan 2023 15:24:19 +0000 webfull 186026 at /channels What the rise of oxygen on early Earth tells us about life on other planets /channels/channels/news/what-rise-oxygen-early-earth-tells-us-about-life-other-planets-337051 <p>When did the Earth reach oxygen levels sufficient to support animal life? Researchers from Æ»¹ûÒùÔº have discovered that a rise in oxygen levels occurred in step with the evolution and expansion of complex, eukaryotic ecosystems. Their findings represent the strongest evidence to date that extremely low oxygen levels exerted an important limitation on evolution for billions of years.</p> Mon, 31 Jan 2022 20:02:49 +0000 webfull 177479 at /channels By 2500 earth could be alien to humans /channels/channels/news/2500-earth-could-be-alien-humans-334080 <p>To fully grasp and plan for climate impacts under any scenario, researchers and policymakers must look well beyond the 2100 benchmark. Unless CO2 emissions drop significantly, global warming by 2500 will make the Amazon barren, the American Midwest tropical, and India too hot to live in, according to a team of international scientists.</p> Wed, 13 Oct 2021 13:18:17 +0000 webfull 173868 at /channels Æ»¹ûÒùÔº experts: April 22, Earth Day /channels/news/mcgill-experts-april-22-earth-day-235341 Thu, 17 Apr 2014 14:00:57 +0000 webfull 102470 at /channels Isotopic memory of atmospheric persistence /channels/news/isotopic-memory-atmospheric-persistence-241074 <p>Chemical analysis of some of the world’s oldest rocks, by an international team led by Æ»¹ûÒùÔº researchers, has provided the earliest record yet of Earth's atmosphere. The results show that the air 4 billion years ago was very similar to that more than a billion years later, when the atmosphere -- though it likely would have been lethal to oxygen-dependent humans -- supported a thriving microbial biosphere that ultimately gave rise to the diversity of life on Earth today. Wed, 14 Jan 2015 15:16:55 +0000 webfull 107488 at /channels Humans push state of the ‘Earth System’ to Danger Zone /channels/news/humans-push-state-%E2%80%98earth-system%E2%80%99-danger-zone-241160 Fri, 16 Jan 2015 21:27:50 +0000 webfull 107594 at /channels How long would it take to fall through the earth? /channels/news/how-long-would-it-take-fall-through-earth-243842 Thu, 26 Mar 2015 20:32:43 +0000 webfull 109115 at /channels New theory on how Earth’s crust was created /channels/channels/news/new-theory-how-earths-crust-was-created-268001 <p>More than 90% of Earth’s continental crust is made up of silica-rich minerals, such as feldspar and quartz. But where did this silica-enriched material come from? And could it provide a clue in the search for life on other planets?</p> Fri, 05 May 2017 15:17:20 +0000 webfull 128111 at /channels