Dark matter could be a cosmic relic from extra dimensions

An interstellar object exploded over Earth in 2014, declassified government data reveal | Where did the unicorn myth come from? | What's the tallest wave ever recorded on Earth? Created for {EMAIL} | [Web Version]( April 11, 2022 CONNECT WITH LIVESCIENCE  [Facebook]( [Twitter](  [LIVESCIENCE]( Amazing science every day [SIGN UP]( ⋅ [WEBSITE](  [] Top Science News [] [An interstellar object exploded over Earth in 2014, declassified government data reveal]( [An interstellar object exploded over Earth in 2014, declassified government data reveal]( (Vadim Sadovski via Shutterstock) A fireball that blazed through the skies over Papua New Guinea in 2014 was actually a fast-moving object from another star system, according to a recent memo released by the U.S. Space Command (USSC). The object, a small meteorite measuring just 1.5 feet (0.45 meter) across, slammed into Earth's atmosphere on Jan. 8, 2014, after traveling through space at more than 130,000 mph (210,000 km/h) — a speed that far exceeds the average velocity of meteors that orbit within the solar system, according to a 2019 study of the object published in the preprint database arXiv. Full Story: [Live Science]( (4/11) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [Never Stop Learning]( From big space discoveries to ancient mysteries and future tech, our Knowledge magazines are packed with engaging, authoritative content for all ages. With expert editorial teams across history, science and technology, we have everything you need to feed your curiosity. [Subscribe today!]( ADVERTISEMENT [] Life’s Little Mysteries [] [Where did the unicorn myth come from?]( [Where did the unicorn myth come from?]( (Anna Orsulakova via Getty Images) The unicorn is one of the most famous mythical creatures, often depicted as a white horse with a spiraling horn erupting from its forehead. It's not hard to imagine a horse with a horn, and for much of the mythical creature's history, people thought it actually existed. But where did this myth come from? Full Story: [Live Science]( (4/9) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] [What's the tallest wave ever recorded on Earth?]( [What's the tallest wave ever recorded on Earth?]( (Shutterstock) In July 1958, an 8.3-magnitude earthquake at the Fairweather Fault rocked Alaska's southern coast. The ground-shaking event caused a massive landslide at nearby Lituya Bay, which triggered a devastating tsunami that ripped through the narrow body of water and killed five people. The colossal wave leveled trees on the steep slopes surrounding the bay up to a maximum height of 1,719 feet (524 meters) above sea level — higher than New York's Empire State Building (which stands at 1,454 feet, or 443 m). This is known as the runup height, or the height the wave reaches after it makes landfall. Full Story: [Live Science]( (4/9) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] Math & Physics [] [Dark matter could be a cosmic relic from extra dimensions]( [Dark matter could be a cosmic relic from extra dimensions]( (Illustration Credit & Copyright Tom Abel & Ralf Kaehler (KIPAC, SLAC), AMNH) Dark matter, the elusive substance that accounts for the majority of the mass in the universe, may be made up of massive particles called gravitons that first popped into existence in the first moment after the Big Bang. And these hypothetical particles might be cosmic refugees from extra dimensions, a new theory suggests. The researchers' calculations hint that these particles could have been created in just the right quantities to explain dark matter, which can only be "seen" through its gravitational pull on ordinary matter. "Massive gravitons are produced by collisions of ordinary particles in the early universe. This process was believed to be too rare for the massive gravitons to be dark matter candidates," study co-author Giacomo Cacciapaglia, a physicist at the University of Lyon in France, told Live Science. Full Story: [Live Science]( (4/9) [LinkedIn]( [Twitter]( [Facebook]( [Email]( Featured Content Sponsored Content from Gigabyte [Unleash your full potential with Gigabyte Aero laptops]( With an industry-leading display, 11th Gen Intel chips, and Nvidia RTX 3000 series graphics cards, the Gigabyte AERO 17 HDR laptops have all the power gamers and creative professionals need, and more. [Read more and enter to win a Aero 17 HDR laptop]( [] Your Health [] [A dozen squirming fly larvae cause man's 'itchy eye']( [A dozen squirming fly larvae cause man's 'itchy eye']( (Peddalanka Ramesh Babu via Getty Images) A man's itchy eye was due to more than a dozen fly larvae that were squirming around inside his peeper, according to a new report. The 53-year-old man, who lives in France, went to the emergency room after he developed an itching sensation in his right eye that had lasted several hours, according to the report, published online Wednesday (April 6) in The New England Journal of Medicine. He told doctors that, earlier that day, he had been gardening near a horse and sheep farm when he felt something enter his eye, the report said. Full Story: [Live Science]( (4/9) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] Curious Creatures [] [100-year-old Greenland shark that washed up on UK beach had brain infection, autopsy finds]( [100-year-old Greenland shark that washed up on UK beach had brain infection, autopsy finds]( (© Cornwall Marine Pathology Team) The super-rare Greenland shark that washed ashore in England last month had a brain infection when it died, according to an animal autopsy of its remains. Pathologists discovered evidence of meningitis, an inflammation of the protective membranes that cover the brain and spinal cord, according to a statement from the Zoological Society of London (ZSL). This is the first reported disease-related death in a Greenland shark (Somniosus microcephalus), an elusive, long-lived species that lives in the deep waters of the Arctic and North Atlantic. Full Story: [Live Science]( (4/8) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] Daily Quiz [] POLL QUESTION: True or false: A recent U.S. Space Command memo confirmed that 'Oumuamua wasn't actually the first interstellar object detected in our solar system. (Learn the answer [here]() [Vote]( [True]( [Vote]( [False](   [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