News articles over the past few years have implicated everything from sunlight's ultraviolet radiation to burnt toast as potential carcinogens, or cancer-causing substances. So, should you be rushing to cut these everyday exposures out of your life? Well, it depends on the material you are talking about, and how much and how often you are in contact with it.

A famous 1936 image shows the people of Nebraska sprawled on the capitol lawn to escape record-breaking temps that had turned their AC-free homes into slow roasters. These vintage photos can make modern summer heat seem cool in comparison. But it isn't. Average temperatures today are warmer than they were a century ago. And this week, the National Oceanic Atmospheric Administration (NOAA) declared the first six months of 2017 the second warmest on record. First place went to 2016.

It seems like a lady as large as a Tyrannosaurus rex should be able to outrun you. She may have a big head and little arms, but she's still got massive gams to propel her through the jungle. Alas, her quads are no match for the average human's—at least in the short term.

CAESAR'S LAST BREATH: Decoding the Secrets of the Air Around Us by Sam Kean is available now.

A widely-shared, altered image of President Trump's sons, Donald Jr. and Eric. The photo on the left is the real photograph. The one on the right has been altered to be (even) less flattering.

You could be forgiven for assuming that Glass, Google's head-mounted augmented-reality device, had been effectively dead since 2015. But as Google's sister company X, the Moonshot Factory, announced on Tuesday, the project has been pivoting to a business-to-business model over the past two years. The new, updated version of the device is known as Glass Enterprise Edition, and it's been put to use at companies like Boeing, DHL—and in physician's office.

On Wednesday, SpaceX CEO Elon Musk announced that the company is switching up its plans for landing on Mars.

The invasive species didn't mean to be bad. Not really. Often introduced to solve uniquely human problems like pests or erosion, plants and animals that find themselves in a new place, far from their native habitat, aren't actually making an effort to destroy everything they nibble on or colonize. They're just growing and flourishing the way living things do.

Eliminating meat from a terrible diet doesn't really make it any healthier, according to a study released today in the Journal of the American College of Cardiology. In fact, the study found that participants whose mostly-plant-based diets (think vegetarian or vegan) included a lot of processed foods, such as sugary beverages and French fries, were more likely to develop heart disease or die during the study period than people who avoided processed food—even if that meant eating a little meat.

John F. Kennedy was known for his youth and energy, but in the decades since his death we've realized that there was more to the story: The 35th President of the United States actually battled an impressive collection of medical problems. Among these was agonizing back pain that led Kennedy to undertake four surgeries.

If you're gonna call something “diet,” it should have to actually help you lose weight. But like dieting itself, diet foods don't work as well in practice as they do in theory.

If there's one meal guaranteed to meet the needs of picky toddlers, harried parents, and broke college students alike, it's mac-n-cheese. Whether you prefer the classic stuff in the blue box or the organic brand famous for its pasta bunnies, you probably realize that mac-n-cheese isn't healthy, exactly. But given the fast food alternatives, we tell ourselves, it's isn't that bad. And yet, because everything we love is secretly conspiring to kill us, a recent report suggests that each serving of America's favorite processed cheese food also serves up a hefty dose of phthalates, a class of chemicals increasingly thought to interfere with the body's hormones. But does this mean that you should give up eating that orange goo?

Move over Tyrannosaurus rex: There's a new prehistoric carnivore in town. Meet the Razanandrongobe sakalavae, an ancient crocodile from Madagascar measuring as much as 20 feet long by 5 feet wide. Razana's name comes from the native Malagasy for “giant lizard ancestor from Sakalava.” This croc had steak knives for teeth, and was the first of its subfamily to live mostly on land.

This carrying case is part of the $699 Fly More Combo, which comes with extra propellers (shown), an extra battery, propeller guards, a dedicated battery charger, and the $150 remote.