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How To: Check Your Heart Rate on Any Android Phone

Samsung created quite a buzz when it debuted a built-in heart rate sensor on the Galaxy S5 back in 2014, but amazingly, not many other manufacturers decided to follow suit. It's really a shame, too, since data from a heart rate sensor would go perfectly hand in hand with the increasing fitness- and activity-tracking features that most smartphones sport these days.

How To: Calm Your Fear of Public Speaking for Better Presentations

Sweaty palms, stuttered speech, and terror blackouts: if you're someone who absolutely despises speaking before audiences, you've probably experienced side effects like these. No matter how well prepared we are, or how familiar our audience is, giving a presentation can be an experience more terrifying than death, according to psychologists. Unfortunately, it's impossible to avoid public speeches, but you can make these events less frightening with a few simple hacks.

How To: 8 Tricks for Fixing Your iPhone's Broken Home Button

When a phone has only one main button, it can be pretty frustrating when that one button doesn't really work anymore. If you have an iPhone 4 or 4S, you know exactly what I'm talking about. Yep, the Home button, which is prone to unresponsiveness and lag. Most users blame the Home button issues on either dirt, moisture, or misalignment. No matter what the reason, having a busted Home button sucks, especially for those of you no longer under warranty. But that's okay, because there are a few t...

How To: Geek Up Your Holidays with These 10 Nerdy DIY Christmas Tree Ornaments

One of the more enjoyable parts of Christmas (other than opening gifts of course) is going out to find the perfect tree, struggle bringing it into the house, and decorating it. As the years went by, I realized that our tree looked exactly like every other tree in the neighborhood: the same lights, the same angel at the top, and the same red, green and white ornaments.

News: 10 Terrifying Diseases You're Going to Be Hearing a Lot More About

You may not have heard of visceral leishmaniasis, onchocerciasis, or lymphatic filariasis, and there is a reason for that. These diseases, part of a group of infections called neglected tropical diseases (NTDs), impact more than a billion people on the planet in countries other than ours. Despite the consolation that these often grotesque illnesses are "out of sight, out of mind," some of these infections are quietly taking their toll in some southern communities of the US.

How To: Silence Annoyingly Loud Emergency Alerts on iPhone Without Disabling Them Completely

Wireless emergency alerts help warn mobile phone users of imminent threats to life or property, such as extreme weather and natural disasters. These alerts target affected geographic areas and come with a loud sound scary enough to make you want to turn off emergency alerts altogether on your iPhone, but there's a way to keep emergency alerts without the ear-splitting, intrusive sound.

News: This Genetic Defect Could Be Why Typhoid Mary Never Got Typhoid Fever

Whether or not a microbe is successful at establishing an infection depends both on the microbe and the host. Scientists from Duke found that a single DNA change can allow Salmonella typhi, the bacteria that causes typhoid fever, to invade cells. That single genetic variation increased the amount of cholesterol on cell membranes that Salmonella and other bacteria use as a docking station to attach to a cell to invade it. They also found that common cholesterol-lowering drugs protected zebrafi...

Tasty Testing: Artisanal Cheese Reveals Microbial Secrets of Deliciousness

Whether your palate runs to domestic or imported, a piece of cheese can be a real treat for the senses. Its smell, taste, and texture are all parts of its appeal. A big part of what makes that savory wonderfulness comes from the microbes in and on the cheese. Thanks to a team of researchers dedicated to studying those microbes, we have a better understanding of their importance to cheese and us.

News: Scientists Show That the Earlier HIV Is Treated, the Better

HIV-infected people who are treated long-term with antiviral drugs may have no detectable virus in their body, but scientists know there are pools of the virus hiding there, awaiting the chance to emerge and wreak havoc again. Since scientists discovered these latent pools, they have been trying to figure out if the remaining HIV is the cause of or caused by increased activation of the immune system.