Last Roman gladiator arena ever built unearthed in Switzerland

'X particle' from the dawn of time detected inside the Large Hadron Collider | Last Roman gladiator arena ever built unearthed in Switzerland | Two planes report 'bright green UFO' swooping through the clouds over Canada Created for {EMAIL} | [Web Version]( January 26, 2022 CONNECT WITH LIVESCIENCE  [Facebook]( [Twitter](  [LIVESCIENCE]( [LIVESCIENCE]( Amazing science every day [SIGN UP]( ⋅ [WEBSITE](  [] Top Science News [] ['X particle' from the dawn of time detected inside the Large Hadron Collider]( ['X particle' from the dawn of time detected inside the Large Hadron Collider]( (Shutterstock) Physicists at the world's largest atom smasher have detected a mysterious, primordial particle from the dawn of time. About 100 of the short-lived "X" particles — so named because of their unknown structures — were spotted for the first time amid trillions of other particles inside the Large Hadron Collider (LHC), the world's largest particle accelerator, located near Geneva at CERN (the European Organization for Nuclear Research). Full Story: [Live Science]( (1/25) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] History & Archaeology [] [Last Roman gladiator arena ever built unearthed in Switzerland]( [Last Roman gladiator arena ever built unearthed in Switzerland]( (Kantonsarchäologie Aargau; © Kanton Aargau) Archaeologists in Switzerland have uncovered the ruins of a Roman-era amphitheater — possibly the youngest on record — where spectators likely watched gladiator fights and animal hunts with bated breath. The oval-shaped amphitheater was built in an abandoned Roman quarry that had been in use until late antiquity. This clue, combined with the discovery of a coin dating to between A.D. 337 and 341 at the site, indicates that the amphitheater dates to the fourth century A.D., which would make it the youngest amphitheater in the Roman Empire, Jakob Baerlocher, an archaeologist at the site and head of excavations in Kaiseraugst, Switzerland, told Live Science. Full Story: [Live Science]( (1/26) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] In the Sky [] [Two planes report 'bright green UFO' swooping through the clouds over Canada]( [Two planes report 'bright green UFO' swooping through the clouds over Canada]( (Getty) Late on July 30, pilots of two separate aircrafts — one military and one commercial — reported seeing a mysterious green UFO vanish into the clouds over the Gulf of Saint Lawrence on the Atlantic coast of Canada, Vice News reported. According to a report posted Aug. 11 to the Canadian government's aviation incident database, both flights witnessed a "bright green flying object" that "flew into a cloud, then disappeared." The object did not impact the operations of either flight, the report noted. Full Story: [Live Science]( (1/25) [LinkedIn]( [Twitter]( [Facebook]( [Email]( Featured Content Sponsored Content from Gigabyte [Unleash your gaming potential with Gigabyte Aero laptops]( When it comes to editing and rendering, performance is all that matters to content creators. Inspired by the "performance-above- all" mentality, Gigabyte delivers to the market a solution that satisfies the most fastidious content creators, the Aero laptop series. [Read more and enter to win a 15" Aero laptop]( [] Astronomy & Astrophysics [] [Eta Carinae's epic supernova explosion comes to life in new visualization]( [Eta Carinae's epic supernova explosion comes to life in new visualization]( (NASA, ESA, STScI, NASA-JPL, Caltech, CXC, ESO, NOAO, AURA, NSF, Akira Fujii , Jon A. Morse (BoldlyGo Institute), Nathan Smith (University of Arizona), SM4 ERO Team) A new visualization shows the power of an epic supernova erupting in deep space. The video shows the famous explosion in the Eta Carinae star system that briefly made it the brightest object in the sky in the year 1843. More than 170 years later, the two lobes of the supernova are still expanding into space, providing a rich trove of data to gather. Full Story: [Live Science]( (1/26) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] Daily Quiz [] POLL QUESTION: Does every star have planets? (Learn the answer [here]() [Vote]( [Yes]( [Vote]( [No](   [Sign Up]( | [Update Profile]( | [Unsubscribe]( [Privacy Policy]( | [Cookies Policy]( | [Terms and Conditions]( CONTACT US: [FEEDBACK](mailto:livescience@smartbrief.com) | [ADVERTISE]( Future US LLC © 1100 13th St. NW, Suite 1000, Washington, DC 20005