Plus, cats really love to sit in squares, and we wonder what art movements are happening right now.

Happy Saturday What do Helen Mirren, Mick Jagger, Paul McCartney, Elton John and king penguin Nils Olav III have in common? They've all been knighted! Check out our article to read more on knights. 10 Emergency Medical Procedures That Can Be Done on the Fly A person falls to the ground, unconscious, clutching his heart. A diner begins choking on a piece of steak, her face slowly turning blue. In such emergencies, many of us would know what to do: Perform CPR on the man, and the Heimlich maneuver on the woman. But what if you were bit by a venomous snake? Or shot? Read more >> 'If I Fits I Sits': The Science Behind Cats Sitting in Squares A study using citizen science tries to help explain why cats love sitting in boxes — even ones that aren't there. What did they find out? Read more >> Finding Hidden Cameras in Vacation Rentals About 11 percent of Airbnb guests have found a hidden camera in their rented home, finds one survey. How do you check for one? Read more >> 'There Are No Art Movements Today,' Says Art Expert You may be familiar with past art movements like impressionism or cubism. Why aren't there any today? Read more >> How to Clean Your Dryer Vent There were nearly 14,000 fires involving dryers in the U.S. from 2014-2018. Might be a good idea to clean your dryer. Read more >> Can U.S. Schools Require COVID-19 Vaccines for Students? With the first COVID-19 vaccine now authorized for U.S. adolescents ages 12 and up, a big question looms: Will students be required to get the vaccine before returning to their classrooms in the fall? Read more >> Test Your Knowledge   If you've been reading our emails this week, you might get these questions right! True or false: Rewilding is different from most conservation efforts in that it doesn't just look at saving one particular animal, instead it involves dozens if not hundreds of projects that aim to enable ecosystems to restore themselves. Each of these companies are worth more than $1 billion. Which one did Elon Musk not create or co-found? a) PayPal b) SpaceX c) Stripe d) Tesla What part of the rhubarb plant is poisonous? a) Leaf b) Stalk c) Flower head d) Roots When was the first practical dishwasher invented? a) 1886 b) 1922 c) 1955 d) 1978 True or false: One study found that during winter more than half of Southern California's homes featuring gas stoves had indoor pollutant levels exceeding safe limits. This can be mitigated substantially by always using a kitchen exhaust fan when cooking. Check Your Answers Copyright © 2021 HowStuffWorks, All rights reserved. You are receiving this email because you opted in at our website howstuffworks.com Our mailing address is: HowStuffWorks 1501 Main St Suite 101 Venice, CA 90291 Want to change how you receive these promotional emails? You can update your preferences or unsubscribe from this list