Plus, we dive into a hidden Antarctic lake and wonder if runner's high is real.

Happy Saturday This gemstone, found in just one place on Earth, is 1,000 times rarer than diamonds. Can you guess what it is? Find the answer here.   House Hunting? Be Prepared to Win a Bidding War The housing market in the U.S. is off the charts. Housing inventory is at record lows, and median existing-home sales prices are up 19.1 percent year over year. So how's a buyer supposed to win in this seller's market? Read more >> Memorial Day in the U.S. Means Way More Than Barbecue Before lighting up the grill and diving into the pool, get to know why this holiday holds a special place in so many American's hearts. Read more >> Uncovering Lake Vostok, Hidden Under 2 Miles of Antarctic Ice Kind of makes you wonder who first guessed there was a lake down there. Read more >> From Books to Beans: Public Libraries Pitch in to Distribute Food In the summer of 2021, U.S. public libraries everywhere, will offer free meals to families with children in their local communities. Read more >> Congee Is the Food Equivalanet of a Warm, Heated Gravity Blanket You should add this comfort food to your list if it's not on there already. Read more >> Is Runner's High Even Real? "As someone who runs, I have definitely experienced those wonderful days when it happens, and it's the best thing in the world," says one runner and performance coach. Read more >> Test Your Knowledge   If you've been reading our emails this week, you might get these questions right! In 2017, approximately how many phone calls were made to 911 in the United States? a) 900 thousand b) 12 million c) 240 million True or false: Only audible noise — sounds within the range of human hearing — has the power to cause negative effects on the human body. True or false: In an experiment where 5,000 fictitious resumés were submitted to "help wanted" ads in Chicago and Boston newspapers, resumes with whiter-sounding names (think Emily or Greg) received 50% more callbacks than stereotypical black names (like Lakisha and Jamal). Approximately what percentage of tropical storms turn into hurricanes? a) 8% b) 25% c) 50% d) 90% Many major cities in the U.S. have Chinatowns. How many Chinatowns is New York reported to have? a) 3 b) 5 c) 9 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 1401 Main Street Venice, CA 90291 Want to change how you receive these promotional emails? You can update your preferences or unsubscribe from this list

Havana syndrome sounds like something out of a Dan Brown novel, but this strange condition is terrifyingly real.

Trending Story In a suburb of Washington, D.C., a woman was walking her dog. Suddenly, an intense ringing filled her ears. Her head began to ache, her face to tingle, and reportedly, her dog suffered convulsions. At the time — November 2019 — the woman, according to reporting by GQ, was on staff at the White House. A year later, a similiar incident occurred. Each marked a suspected instance of "Havana Syndrome," a bizarre illness that had plagued overseas U.S. government employees for half a decade. Only this time, it was happening on U.S. soil. What Are the Mysterious 'Havana Syndrome' Attacks in D.C.? May 27, 2021 | By Joanna Thompson Read more >> Related Stories When Sound Makes You Sick Mystery Behind Cuba's Alleged Sonic Attack Deepens In Case You Missed It Here's How Scientists Predict the Next Hurricane Season May 24, 2021 | By Kristopher Karnauskas Are Pentagon-confirmed UFOs a National Security Threat? May 26, 2021 | By Jennifer Walker-Journey June Bugs Are a Nuisance for People, Manna for Other Animals May 24, 2021 | By Alia Hoyt 7 Secret Caves We'd Love to See Inside May 14, 2021 | By Stephanie Parker What did you think of this email?   Leave a Comment 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 1401 Main Street Venice, CA 90291 Want to change how you receive these promotional emails? You can update your preferences or unsubscribe from this list