US military reports 'several hundred' UFO sightings in 2022, Pentagon officials claim

Aerial investigation reveals 168 previously unnoticed Nazca Lines in Peru | What is Occam's razor? | Scientists invent 1st 'vagina-on-a-chip' Created for {EMAIL} | [Web Version]( December 20, 2022 CONNECT WITH LIVESCIENCE  [Facebook]( [Twitter](  [LIVESCIENCE]( Amazing science every day [SIGN UP]( ⋅ [WEBSITE](  [] Top Science News [] [US military reports 'several hundred' UFO sightings in 2022, Pentagon officials claim]( [US military reports 'several hundred' UFO sightings in 2022, Pentagon officials claim]( (Shutterstock) The U.S. government's brand new UFO-tracking office has been open for half a year but business is already booming. Over the last six months, the office — named the All-Domain Anomaly Resolution Office (AARO) — has received "several hundreds" of new UFO reports from U.S. military personnel, office director Sean Kirkpatrick told the Associated Press. Full Story: [Live Science]( (12/19) [] History & Archaeology [] [Aerial investigation reveals 168 previously unnoticed Nazca Lines in Peru]( [Aerial investigation reveals 168 previously unnoticed Nazca Lines in Peru]( (Yamagata University) Archaeologists have discovered 168 previously unknown geoglyphs — often called Nazca Lines — that Indigenous people created more than a millennia ago in the Aja area, near the city of Nazca, Peru. The newfound geoglyphs include outlines of humans, camelids, birds, killer whales, felines and snakes. Full Story: [Live Science]( (12/20) [] Life’s Little Mysteries [] [What is Occam's razor?]( [What is Occam's razor?]( (Laurence Dutton via Getty Images) Occam's razor (also spelled Ockham's razor) cuts through complexity with a no-nonsense approach. The philosophical maxim "Numquam ponenda est pluralitas sine necessitate," written by 14th-century Franciscan friar William of Ockham, translates to "Plurality must never be posited without necessity." In other words, all else being equal, simplicity is best. So is this actually true? Is the simplest explanation usually the best one? Full Story: [Live Science]( (12/19) Featured Content Sponsored Content from Pfizer [Pfizer's using Artificial Intelligence to change medication development]( Artificial intelligence is set to play a massive role in how medication is developed going forward. Pfizer is using it to uncover how diseases develop in the body, screen for the best molecules for new medications, and even create individualized treatment plans. [Learn more here.]( [] Your Health [] [Scientists invent 1st 'vagina-on-a-chip']( [Scientists invent 1st 'vagina-on-a-chip']( (Harvard’s Wyss Institute) Scientists have developed the world's first "vagina-on-a-chip," a small device that contains live human cells and replicates the cellular environment found inside the vaginal canal. By adding bacteria to the device, aptly named the Vagina Chip, researchers can study how different microbes affect the health of the vagina, the team reported in a new study, published Nov. 26 in the journal Microbiome. Full Story: [Live Science]( (12/20) [] Astronomy & Astrophysics [] [Massive earthquake that shook Mars is 5 times stronger than any other]( [Massive earthquake that shook Mars is 5 times stronger than any other]( (NASA/JPL-Caltech) NASA's InSight Mars Lander has detected a marsquake at least five times as large as the next largest ever recorded on the Red Planet. It had a magnitude of 4.7, lasted more than four hours and was unlike any of the thousands of Marsquakes previously detected. The previous biggest Marsquake, detected in August 2021, had a magnitude of 4.2. Full Story: [Live Science]( (12/20) [] Curious Creatures [] [This wasp uses its prickly penis to escape certain death]( [This wasp uses its prickly penis to escape certain death]( (Shinji Sugiura) Only female wasps carry the equipment necessary to sting predators and inject them with toxins. It's therefore widely thought that male wasps are completely defenseless — but now, a study shows how some male wasps can escape certain death using nonvenomous but extremely spiky genitalia. Full Story: [Live Science]( (12/20) [] [Female zebra shark opts for 'virgin birth' even when sharing a tank with healthy males]( [Female zebra shark opts for 'virgin birth' even when sharing a tank with healthy males]( (Shedd Aquarium/Brenna Hernandez) A female zebra shark (Stegostoma fasciatum) has given birth by fertilizing her own eggs, despite sharing a tank with two healthy males who likely would have been eager to help, reports a new study in the Journal of Fish Biology. This unusual scenario challenges prior assumptions about the risks and benefits of parthenogenesis — a form of asexual reproduction sometimes nicknamed "virgin birth" — according to the study's authors. Full Story: [Live Science]( (12/20) [] Daily Quiz [] POLL QUESTION: True or false: It's very common for animals that can use parthenogenesis to use the reproductive strategy even when viable mates are available. (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