A peak is shrouded in smoke from regional wildfires on July 14, at Grand Teton National Park, south of Yellowstone. Natalie Behring/Getty Images hide caption
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Overhead irrigation of this newly planted crop of carrots is putting pressure on the available groundwater supplies in Cuyama, California. Located in the northeastern corner of Santa Barbara County, the sparsely populated and extremely arid Cuyama Valley has become an important agricultural region, producing such diverse crops as carrots, pistachios, lettuce, and wine grapes. George Rose/Getty Images hide caption
A medical assistant administers a coronavirus test last week in Los Angeles. COVID-19 cases are on the rise as the highly transmissible delta variant has become the dominant coronavirus strain in the United States. Mario Tama/Getty Images hide caption
In this May 24, 2021 file photo, Tedros Adhanom Ghebreyesus, Director General of the WHO, speaks at WHO headquarters, in Geneva, Switzerland. The WHO is asking China to be more transparent as scientists search for the origins of the coronavirus. Laurent Gillieron/AP hide caption
A combination of dependency on tips and requirements to appear positive on the job — "service with a smile" — contributes to a culture of sexual harassment in the service industry, a new study says. Ringo H.W. Chiu/AP hide caption
An Eastern Gray Squirrel eats some seeds and nuts from a bird feeder. Travis Lindquist/Getty Images hide caption
A thick haze hangs over Manhattan on Tuesday. Wildfires in the West, including the Bootleg Fire in Oregon, are creating hazy skies and poor air quality as far away as the East Coast. Julie Jacobson/AP hide caption
With new infections rising around the country due to the delta variant, reports of breakthrough cases among the fully vaccinated can be worrisome. Mario Tama/Getty Images hide caption
Will Delta Surge Sway Unvaccinated? Plus: The Truth About 'Breakthrough' Infections
A man refuels his car in Paris in 2020. Men spend their money on greenhouse gas-emitting goods and services at a much higher rate than women, researchers found. Franck Fife/AFP via Getty Images hide caption
A sign at Newcomb Hollow Beach in Wellfleet, Mass., warns of sharks in 2019. Beachgoers on the other side of the world will be happy to learn they will not be attacked by sharks ... just bitten. Charles Krupa/AP hide caption
Mountaineers climb the Hillary Step during their ascend of the South face to summit Mount Everest. Lakpa Sherpa/AFP via Getty Images hide caption
A fence alongside Greenwood Cemetery, in Brooklyn, N.Y., is covered with memorial art for people who died of COVID-19. Pandemic deaths contributed to the biggest drop in life expectancy in decades. Andrew Lichtenstein/Corbis via Getty Images hide caption
Blue Origin's New Shepard rocket launches on Tuesday morning, carrying passengers Jeff Bezos, founder of Amazon and space tourism company Blue Origin; his brother, Mark Bezos; 82-year-old female aviation pioneer Wally Funk; and 18-year-old Oliver Daemen from its spaceport near Van Horn, Texas. Tony Gutierrez/AP hide caption
Covid-19 infections in New York City are climbing for the first time in months as the delta variant gains traction and vaccination rates in some boroughs remain stubbornly low. Bloomberg/Bloomberg via Getty Images hide caption
Technology consultant Frank Thai creates a 3-D scan of a preserved cadaver in the medical school's Anatomy Resource Center. Kaiser Permanente Bernard J. Tyson School of Medicine hide caption
How The Pandemic Shaped Medical Education And, Ultimately, Your HealthCare
When working out in the summer, watch for the signs of dehydration and heat stroke. Choosing a later evening or early morning time for a run in one smart way to stay safe. RyanJLane/Getty Images hide caption