Astonished fishers reel in gigantic 400-pound stingray in Cambodian river

Scientists finally have proof of mysterious immune cell in humans | Rare 2,300-year-old tomb in Istanbul holds partially cremated body | Underground city unearthed in Turkey may have been refuge for early Christians Created for {EMAIL} | [Web Version]( May 13, 2022 CONNECT WITH LIVESCIENCE  [Facebook]( [Twitter](  [LIVESCIENCE]( Amazing science every day [SIGN UP]( ⋅ [WEBSITE](  [] Top Science News [] [Scientists finally have proof of mysterious immune cell in humans]( [Scientists finally have proof of mysterious immune cell in humans]( (KATERYNA KON/SCIENCE PHOTO LIBRARY via Getty Images) While working to map every cell in the human body, scientists uncovered an elusive type of immune cell that first emerges in the womb. The existence of such cells in humans has been hotly debated — until now. These mysterious cells, known as B-1 cells, were first discovered in mice in the 1980s, according to a 2018 review in The Journal of Immunology. These cells arise early in mouse development, in the womb, and they produce various antibodies when activated. Some of these antibodies latch onto the mouse's own cells and help to clear dying and dead cells from the body. Activated B-1 cells also make antibodies that act as a first line of defense against pathogens, like viruses and bacteria. Full Story: [Live Science]( (5/12) [LinkedIn]( [Twitter]( [Facebook]( [Email]( Just the Facts, Ma'am "I stopped watching TV news a year ago, so sick of the bias everywhere. But in doing so, I was out of the loop. I decided to give 1440 a try & I've not been disappointed. Finally, Walter Cronkite style reporting! Just the facts. I also love that I can click a link to see more on many stories. Keep up the good work!" [Join for free now](. ADVERTISEMENT: [] History & Archaeology [] [Rare 2,300-year-old tomb in Istanbul holds partially cremated body]( [Rare 2,300-year-old tomb in Istanbul holds partially cremated body]( (Photo by Sebnem Coskun/Anadolu Agency via Getty Images) A 2,300-year-old brick tomb contains the cremated remains of an individual whose body was likely placed in the tomb then set on fire, archaeologists in Istanbul have announced. A tomb like this is a rare find, archaeologists say. At the time this person was buried, the area was known as Chalcedon, then a flourishing city during the Hellenistic era. The tomb, which contains the cremated remains of at least one person, was found at the Haydarpaşa Train Station in Istanbul. Archaeologists also found a terracotta goblet and a perfume bottle within it, Rahmi Asal, director of the Istanbul Archaeological Museums, told the Turkish government-owned Anadolu Agency. Full Story: [Live Science]( (5/13) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] [Underground city unearthed in Turkey may have been refuge for early Christians]( [Underground city unearthed in Turkey may have been refuge for early Christians]( (Photo by Halil Ibrahim Sincar/Anadolu Agency via Getty Images) Archaeologists in southeastern Turkey have unearthed a vast underground city that was built almost 2,000 years ago and could have been home to up to 70,000 people. The subterranean complex may have been a protected space that early Christians used to escape Roman persecution. The first underground chambers of the ancient complex were found about two years ago, during a project to clean and conserve historical streets and houses in the Midyat district of Mardin province. Workers on the project first discovered a limestone cave, and then a passage into the rest of the hidden city, Gani Tarkan, the director of the Mardin Museum and the head of the excavations, told the Turkish government-owned Anadolu Agency. Full Story: [Live Science]( (5/13) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] [Iron Age arrow found on Norway mountain still has feather fletching on it]( [Iron Age arrow found on Norway mountain still has feather fletching on it]( (Espen Finstad/secretsoftheice.com) A spectacularly preserved arrow from the Iron Age — complete with its iron arrowhead, sinew wrappings and aerodynamic feather fletching — is now in the hands of glacial archaeologists in Norway. It's rare for arrow fletching to preserve, as the delicate feathers that help guide the arrow in flight usually decay over time. The arrows of Ötzi the Iceman, who died about 5,300 years ago in what is now the Italian Alps, also have preserved fletching, although their condition isn't as good as that of this newly discovered 1,700-year-old arrow, the archaeologists said. Full Story: [Live Science]( (5/12) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] Curious Creatures [] [Colossal 300-pound alligator gar caught (and released) in Texas bayou]( [Colossal 300-pound alligator gar caught (and released) in Texas bayou]( (WILD LIFE via YouTube) Most people think of fishing as a relaxing way to pass an afternoon. But for YouTuber and conservationist Payton Moore, a recent fishing excursion was instead an intrepid monster hunt. Last week, the Texan set sail down a Houston bayou in search of a truly gargantuan alligator gar (Atractosteus spatula) stretching over 8 feet (2.5 meters) long and tipping the scales at an estimated 300 pounds (136 kilograms). He found what he was looking for —and he even managed to catch the gigantic fish. "It felt like somebody's car had just started up and was rolling out of the driveway, and I’m hanging on to the end of it," Moore told the Houston Chronicle in an interview. Full Story: [Live Science]( (5/13) [LinkedIn]( [Twitter]( [Facebook]( [Email]( [] [Astonished fishers reel in gigantic 400-pound stingray in Cambodian river]( [Astonished fishers reel in gigantic 400-pound stingray in Cambodian river]( (Wonders of the Mekong project) Fishers in Cambodia recently received a massive surprise when they reeled in a gigantic 400-pound stingray. The hefty ray was dragged up from the murky depths of the Mekong River after it swallowed a fish that had already been snagged on the fishers' line. The monstrous ray, which has been identified as a giant freshwater stingray (Urogymnus polylepis), was accidentally caught by locals on May 5 in the Stung Treng province in northeastern Cambodia. The fishers immediately alerted team members from the Wonders of the Mekong project — a conservation group run by the University of Nevada, Reno (UNR), in collaboration with local fishing authorities — who helped remove the fishing line and measure the ray before safely releasing it back into the river. Full Story: [Live Science]( (5/12) [LinkedIn]( [Twitter]( [Facebook]( [Email]( Featured Content Sponsored Content from Dell [UNLEASH THE SPEED OF CREATIVITY]( Our most powerful 13-inch XPS yet. Designed from the ground up to be our highest performing flagship 13 ever so you can do everything you love to do faster. The simplified interiors wow and the best-in-class panels bring your content to life. [Learn More]( [] Poll Question [] POLL QUESTION: Don't forget that the Flower moon lunar eclipse is this weekend! Do you plan to watch? 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