USING A HEART-RATE MONITOR during exercise.

AT AMAZON, shop the 3D printing store. But no 3D gun kits, yet.

Also, end-of-summer savings on Air Conditioners and Dehumidifiers. Plus, get ready for winter with pre-season deals on Space Heaters and Humidifiers.

DAVID BARON, CALL YOUR OFFICE: Colorado Hiker Sings Opera to Calm Stalking Mountain Lion.

Can music soothe a savage beast? If you were to ask 40-year-old Kyra Kopenstonsky, she will tell you that it might have saved her from a cougar attack. Kopenstonsky was hiking a trail near Down Valley Park in Placerville, Colorado on Monday when she encountered a mountain lion. According to a report by the San Miguel County Sheriff’s Office, the lion stalked the hiker for about 20 minutes, during which it would often jump forward and crouch whenever Kopenstonsky attempted to move backwards. She told deputies that when she first saw the animal, she picked up a large branch and attempted to look big. That did not seem to faze the cat, so Kopenstonsky said she did the next thing that came to her mind.

“I don’t know why, I just started singing opera really loud,” Koestonsky later told KUSA. “It kind of put its ears down and just kept looking at me, and it sort of backed away. Then, it came around the bushes an came towards me again and crouched about 10 feet away.”

Something in .454 Casull might have worked, too. Or if you don’t like handguns, this .458 SoCom AR-15 from Wilson Combat, which I’ve kinda had my eye on, should be more than sufficient to address pretty much any predator.

SCIENCE: Scientists Find Life Half a Mile Below Antarctic Ice.

WHAT GOOD IS A DAY OF RAGE WITHOUT ANY RAGE? We Must Have A #DayOfRage To Protest The Failure Of Yesterday’s #DayOfRage.

IRONIC: Calif. Lawmaker Votes for More Regs for Ride-Sharing, Then Gets Busted for DUI. “California Assemblyman Ben Hueso, a Democrat representing the San Diego area, was arrested in the wee hours of the morning for allegedly driving under the influence. This came just hours after voting for legislation that would force more regulation on ride-sharing services like Lyft and Uber.”

IN NEW HAMPSHIRE, Rick Perry Opens up on indictment, border security, Middle-East, business taxes …. and Obama, Shaheen.

BIG COMPANIES, IN MY EXPERIENCE, OFTEN HAVE TWO-FACED IDEAS ABOUT COPYRIGHT: Thomson Reuters Thinks Not Responding To Their Email Means You’ve Freely Licensed All Your Content.

BRUCE SCHNEIER: The NSA Broke Our Trust In The Web. Now We Have To Break Up The NSA. “Today, the NSA’s intelligence mission has expanded from just government-on-government espionage to government-on-population surveillance. At the same time, the communications world has shifted from dedicated circuits that can be passively tapped to a single global Internet infrastructure that requires active attack to eavesdrop on. Everyone uses the same networks, and creating the capability to eavesdrop on foreign communications by engineering backdoors into US technology leaves domestic transmissions vulnerable to eavesdropping. The NSA’s aggressive data-gathering, with seemingly little regard for how that might compromise the security of everyday digital communications—and with only loose oversight (at best) by government watchdogs—has far exceeded what any modern and free society should reasonably expect. Breaking up the agency would do a lot to bring it under control.”

AT AMAZON, fresh deals on Bestselling Products, updated every hour.

And, MP3 Music Deals Galore.

IF HE WERE A REPUBLICAN, THIS WOULD LEAD THE NEWS: Reid apologizes for Asian jokes. You do have to wonder, though, what with the quotas under affirmative action, and the ethnic jokes, whether the Democrats really like Asians much.

ORWELL’S GYM: What if your employer gave you a Fitbit to wear and reduced your health insurance payments if you racked up the right number of steps?

RAMEN NOODLES — HEART ATTACK IN A BOWL? “Think of this the next time you slurp a cheap cup of hot ramen noodles: It could be linked to heart disease, especially if you’re a woman, the AP reports. A new American study of South Korea’s ramen consumption examined the diets of 10,700 people aged 19 to 64. They found both healthy (fish and rice) and unhealthy (meat and fast food) diet trends, but neither was linked to metabolic syndrome and ultimately heart disease, the New York Times explains. When instant noodles were thrown in the mix, researchers saw trouble. Women who ate a cup of them more than twice a week saw a 68% jump in cardiometabolic syndrome. It didn’t matter what else they ate.”

I’m going to stick to steak and red wine, just to be safe.

21ST CENTURY RELATIONSHIPS: ‘Sex Box,’ A Reality TV Show Where Couples Have Sex In A Box and Discuss It, Is Coming to America.

REGULATION: California DMV says Google’s self-driving car must have a steering wheel.

SARAH HOYT’S NEW SHORT STORY COLLECTION, Crawling Between Heaven And Earth, is 99 cents on Kindle for a limited time. How can you say no?

IN PRAISE OF EFFICIENT PRICE GOUGING: Uber’s most important innovation is the way it prices its services. But that innovation has not been unreservedly welcomed by customers. They’re wrong.

Yes, but most people’s economic intuitions are — quite literally — paleolithic. Whole political ideologies have flourished by taking advantage of that.

ASKING THE IMPORTANT QUESTIONS: What Happens When A Volcano Erupts Under A Glacier.

REPORTER: I WILL NOT BE RETURNING TO FERGUSON. “The behavior and number of journalists there is so appalling, that I cannot in good conscience continue to be a part of the spectacle.”