It may even repair damaged enamel and improve your oral microbiome. Breakthroughs, discoveries, and DIY tips sent six days a week. Whitening your teeth often comes at a financial and physical cost. Many of today's most popular products including gels, strips, and rinses rely on peroxide-based bleaching solutions. While effective, the chemical processes generate reactive oxygen species (ROS) compounds that not only destroy staining molecules--they can eventually erode tooth enamel .

We're finally reading the secrets of Herculaneum's lost library A whole library's worth of papyri owned by Julius Caesar's father-in-law were turned to charcoal by the eruption of Vesuvius. Deep within a particle accelerator, theoretical physicist Giorgio Angelotti is hard at work. He sets a black cylinder on a mount, bolts it down, then runs through some safety checks before retreating from the chamber, known as "the hatch". "You have to be sure there's no one in the hatch before you close the door," he says. That's because he is about to blast the sample with a super-powerful beam of X-rays.

Labor Day is the informal beginning of fall, and for many of us, it starts with a nice long weekend. What could be better than sleeping in, enjoying a cool breeze, or treating yourself to one of the innumerable pumpkin spice confections at your favorite coffee shop? We found the best Labor Day deals on gear that WIRED reviewers love, from rain jackets to video games. For more discounts, we've rounded up the best Labor Day Mattress deals here, as well as Labor Day deals on camping and hiking gear. Most of these deals end on Monday night, and we'll be updating this roundup over the weekend as we find more.

Nest changed the thermostat market forever when it introduced the Nest Learning Thermostat nearly a decade ago. The third generation of that product, introduced in 2015, is still one of the best smart thermostats you can buy, but many people recoil from its $249 price tag. The Nest Thermostat E, introduced in 2017, is pretty great, too, but it costs $169 and is still out of reach for some. Today, Nest announces an even more affordable device: the Nest Thermostat. Nest says its Energy Star-rated Nest Thermostat will suggest temperature presets via the Google Home app for when you're home, when you're away, and when you're sleeping, balancing comfort with energy savings.

Alexa is the world's most popular smart assistant and the driving force behind Amazon's beloved Echo smart speaker lineup. These voice-controlled, Alexa-enabled smart speakers can be used to manage your smart home, give you the forecasts for the day ahead, and much more. If you're thinking about inviting Alexa into your home via one of Amazon's Echo speakers, you may be wondering which one to buy. We took a look at two of Amazon's most popular smart speakers, the Echo (third-generation) and the Echo Dot (third-generation) to help you decide which of these handy smart speakers is best for you. The Echo Dot (third-generation) is one of the smallest Amazon Echo smart speakers. The most obvious visual difference between the Echo Dot and the Echo is the size.

The Google Home Hub is already a great deal at $149. While it's not quite as full-featured as the second-generation of Amazon's Echo Show, it's still one of the best smart displays you can buy, with excellent smart home support, a compact design, and support for YouTube streaming. But today Target is making it more desirable than ever: The retailer has slashed the price of the Google Home Hub to $99, but that's not all--you'll also get two Google Home Minis for freeRemove non-product link. Some quick math reveals that this deal will save your whopping $149 on the full retail price of all three. If you've been considering either a Google Home Hub or a couple Google Home Minis, you should pounce on this deal.

Machine learning already plays a big part in your everyday life, and its role is only going to grow. Google searches and muttered requests to Amazon's Alexa may tap into a veiled world of clever algorithms, but these techniques teeter on something much larger: a world of self-developing artificial intelligence. Deep learning, and the neural networks that do the thinking, is becoming an integral seam to digital technology. By extension, artificial intelligence is having a growing effect on our experience of the world and, as an artist, it is a material that can't be ignored. That at least is the thinking of Anna Ridler, who is building a name for herself with works that hoist machine-learning techniques and bring them into the gallery.

Today's home cooks have more options than ever before. New technology is slowly moving into the kitchen, but an appreciation for the basics of cooking continues to grow. We spent time with both the latest kitchen tech and some classics that wouldn't be out of place in our grandparents' home, and developed this list of the best cooking and smart home tech you can buy. Amazon's Alexa virtual assistant puts your voice in control of an ever-expanding universe of smart products, and the Amazon Echo speaker remains the best choice for getting Alexa into your home. Whether you want to play music, check the news, control your lighting, keep an eye on your oven, or even play a game, the Echo has you covered with its always-on functionality.

Generating a coherent synopsis and revealing the development threads for news stories from the increasing amounts of news content remains aformidable challenge. In this paper, we proposed a hddCRP (hybird distant-dependent ChineseRestaurant Process) based HierARChical tOpic model for news Article cLustering, abbreviated as CHARCOAL. Given a bunch of news articles, the outcome of CHARCOAL is threefold: 1) it aggregates relevant new articles into clusters (i.e., stories); 2) it disentangles the chain links (i.e., storyline) between articles in their describing story; 3) it discerns the topics that each story is assigned (e.g., Malaysia Airlines Flight 370 story belongs to the aircraft accident topic and U.S presidential election stories belong to the politics topic). CHARCOAL completes this task by utilizing a hddCRP as prior, and the entities (e.g., names of persons, organizations, or locations) that appear in news articles as clues. Moveover, the adaptation of nonparametric nature in CHARCOAL makes our model can adaptively learn the appropriate number of stories and topics from news corpus. The experimental analysis and results demonstrate both interpretability and superiority of the proposed approach.