Are piranhas really that dangerous?

I can offer you practical knowledge. I live near the River São Francisco in Brazilian Northeast, where there are piranhas. I love this river, and I go there cayaking whenever I can. The first ti…

Top stories for Long   Are piranhas really that dangerous? Eugenio Moutelík, I can change my opinion. • Updated November 12, 2023 I can offer you practical knowledge. I live near the River São Francisco in Brazilian Northeast, where there are piranhas. I love this river, and I go there cayaking whenev... Read more » 2.4K 95   Is taking THC gummies daily bad for older adults? I take 20 to 40 mg daily. Pete Cresswell, former Developer of bond-trading apps for mutual funds (1992-2017) • Updated January 19 Speaking as a board-certified Old Person, my experience has been that 25 mg of THC delivered via a gummy seriously increases the odds of my falling. Full Disclosure: due to ... Read more » 239 50   Are ICE agents immune from the Castle Doctrine? Cheryl Williams, B.S Legal Studies & Philosophy Minor Poli Comm • Answered December 16 No. Not unless they have a proper warrant. Two of them were killed by a Texas homeowner and no charges were filed. They came to the door and identified themselves as "polic... Read more » 2.6K 350   Why doesn't Russia simply invade Ukraine on a massive scale as in World War II and crush Ukraine in one Titanic campaign? Roger Do, worked at National Park Service of the United States • Updated January 19 OP: Why doesn't Russia simply invade Ukraine on a massive scale as in World War II and crush Ukraine in one Titanic campaign? Thanks for all the upvotes. It's pretty crazy. S... Read more » 3.2K 332   What do models eat in a day? How do they not consume sugar? Sindu Bharathi, Mathematician • Answered January 17 I know a girl who modeled. We briefly shared an apartment, she was my flatmate. She smoked a pack and did a lot of weed. She ate very little, one meal a day. The key is to ... Read more » 766 72   Air Transat Flight 236 departed Toronto on August 24, 2001, bound for Lisbon. Alessandro13 • Posted Oct 19, 2024 The Airbus A330 took off at 00:52 and ran out of fuel at 10,500 meters above sea level at 05:45 over the Atlantic Ocean after five hours of flight. Captain Robert Piché and First Officer Dirk de Jag... Read more » 1.1K 91   What makes a PhD degree harder than other degrees (master, bachelor's, etc.)? Raymond Shaw, PhD Psychology, University of Toronto (1990) • Answered January 16 High School: Take these classes, memorize what you are told to, reproduce it on tests. Bachelor's degree: Choose classes that meet requirements, memorize what you are told t... Read more » 65 6   I was fired 3 days ago out of nowhere after 5 years. Now, the CEO emails me that my job has been "re-instated", but when I come back, I will get a warning for "low performance". What can I do? Leggs McGillicutty, worked at Housekeeping • Answered January 9 Your job was not "re-instated". They found out no one wanted or was qualified to replace you. You are not getting the benefit here. If they already "terminated" you you hav... Read more » 1.3K 114   In The Hunt for Red October why is there toilet paper at the USS Dallas' sonar station? Greg Strickland • Answered October 7, 2021 I really enjoyed reading the answers here from other submariners and STSs that indeed correctly identified the reasons that toilet paper was/is present in a sonar shack on ... Read more » 2.6K 73   Why do some people start drinking alcohol in the morning? NH • Answered December 31 If you ever experienced alcohol withdrawal it would be obvious to you. The reason they are drinking in the morning? The have finally hit the point that sleeping for eight hou... Read more » 429 36   Was J. R. R. Tolkien really anti-Semitic? Murphy Barrett • Answered December 22 In 1938 Tolkien was trying to get The Hobbit published in Germany. However, per Goebbels regulations, the publisher, Rütten & Loening demanded proof of Tolkien's Aryan desc... Read more » 2.5K 204   Why do people start living in one room of the house as they age? Rob LeChevallier, J.D Law, University of Oregon School of Law (1978) • Answered June 25, 2025 I am almost 72 and my wife is 71. We sold our large 5 bedroom home where we raised our family six years ago and purchased a townhouse/condo in a 55 and over community only ... Read more » 2K 196 Read more in your feed

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Why do CPUs have three levels of cache, L1, L2, and L3, and not just only one level o...?

L1 cache design is extremely difficult as it has to run at the full CPU clock. The wire sizes must be as short as possible otherwise the CPU frequency would have to be lowered. So adding more L1…

Top stories for Long   Why do CPUs have three levels of cache, L1, L2, and L3, and not just only one level of cache? Why can't we go any higher than L3? Marcelo Pacheco, Since 1984. 8/16/32/64 bit. Linux mostly these days. • Answered January 7 L1 cache design is extremely difficult as it has to run at the full CPU clock. The wire sizes must be as short as possible otherwise the CPU frequency would have to be lowe... Read more » 188 9   Your response is private Was this worth your time? This helps us show content you find valuable. Absolutely not Definitely yes   How did the "9/11 Surfer" survive his fall of 15 floors? Is there any scientific explanation? OakTeller, lives in New York, NY • Answered January 10 The surfer name is a joke thing for a nightmare. He is one of the luckiest men in history. There was no falling nicely in air - If he had, gravity would have smashed him fla... Read more » 7.5K 240   If the police come to my door and ask to see my ID, do I have to show it? Derek Smith, Father of 6, grandfather of 14 and counting. • Updated December 14 Whenever police show up at your door, follow these rules: Rule 1: immediately start recording. Rule 2: don't answer the door. In fact, make sure it is locked. Rule 3: never ta... Read more » 3.3K 132   Why don't predators eat hibernating bears? Sean Kernan, Writer at seanjkernan.substack.com • Answered October 29 If nature were a video game, hibernation would be considered an overpowered feature that needs to be nerfed. The bear goes to sleep and its body begins shutting down, its br... Read more » 10.5K 270   Does marijuana use have to be chronic or all the time to have long lasting effects on addiction? Julie Nutter, works at Gardening • Answered October 20 OMG…I have to disagree with everything you said! First of all I'm 75…started smoking pot when I was 18…and I'm talking every waking hour of every single day! I smoked while... Read more » 1.1K 157   Can you put 1 million dollars in the S&P 500 and live off the interest? Jim Caron, 30+ years as a stock/mutual fund/options/currency investor • Updated January 20 Can you put 1 million dollars in the S&P 500 and live off the interest? The simplest answer is No. That's because 1) you can't invest in the S&P 500 — it's not a financial i... Read more » 2.3K 149   Why isn't .h used in C++? Philippe Dunski, Author of the book "Coder efficacement" (in French) • Answered January 11 Hello, Why isn't .h used in C++? It is… Or, at least, it can be (and many C++ library use it). However, point is that .h is the traditional file extension for C headers and, e... Read more » 91 12   Is it healthy to run every day? Tony Bikelson, studied at University of California, Berkeley • Answered January 19 Previously, I used to run every day for the last 3-4 years consecutively. By consecutively, I mean a minimum of 5-6 miles a day with no rest days, regardless of what my bod... Read more » 323 11   Why is Lucy Liu considered ugly in Asia? She has a high nose bridge and small face. Ewe Yu Yie, Board Member for some non profit organisations (2019-present) • Answered April 23, 2024 This is Lucy Liu at her prime. This is a local Chinese actress at her prime Danielle Sya Carmen Soo... Read more » 404 256   Did the Columbia astronauts have any idea that something was seriously wrong during their mission, and how did they respond in those final moments? Alan Springett, former Physical Scientist/Risk Assessment/writer (1975-2023) • Answered January 5 What most people are unaware of, a crew member of the Columbia was filming onboard during the reentry. That video was only shared with the families and forensic staff. That... Read more » 1.3K 72   It's almost 2026. Would you choose a Mac or a Windows machine? Franklin Veaux, Technology enthusiast, mad engineer, and tech startup founder. • Answered November 5 As we come to the end of 2025, I think buying a new Windows machine is something of a perverse act of idiocy. The Windows 11 Terms of Use for Windows 11 25H2 specifically gr... Read more » 1.9K 234   Why do SNAP recipients not like Costco? I know cashiers there who say they seldom see EBT cards being used for eligible purchases. Geraldine Merola, Proud Mother and Home Maker (2005-present) • Updated August 3, 2021 Costco is not popular with SNAP recipients because items at Costco are packaged in bulk. For instance, a chuck roast is cheaper per pound at Costco than anywhere else. But t... Read more » 3K 474 Read more in your feed

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