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The common murre population in Alaska has been decimated by an ocean heatwave. Linda Burek / iStock / Getty Images Plus

An expanse of uncommonly warm seawater in the Pacific Ocean created by a marine heatwave led to a mass die-off of one million seabirds, scientists have found.

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A quit smoking program sign on the entrance to the Comprehensive Cancer Center at Mount Sinai Medical Center in Miami Beach, Florida. Jeffrey Greenberg / Universal Images Group via Getty Images

A new report from The American Cancer Society has identified the largest single-year decline in the U.S. cancer death rate to date, likely spurred by new treatments and reductions in smoking.

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Obesity poses a number of issues for public health. SIphotography / iStock / Getty Images Plus

One of America's already widespread health issues is projected to worsen over the next decade, as new research from the Harvard T.H. Chan School of Public Health suggests that almost half the adult population in the U.S. will be obese by 2030.

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Permanent hair dyes and chemical hair straighteners could be increasing women's risk of breast cancer. kali9 / E+ / Getty Images

Permanent hair dyes and chemical hair straighteners could be increasing women's risk of breast cancer, according to a new study by the National Institutes of Health.

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The U.S. Centers for Disease Control and Prevention recommends getting regular cholesterol tests shortly after you turn 20. Ca-ssis / iStock / Getty Images Plus

Many people don't begin worrying about their cholesterol levels until later in life, but that may be increasing their odds of heart problems in the long term.

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A healthy diet may reduce hearing loss later in life, according to a new study. PamelaJoeMcFarlane / E+ / Getty Images

Weight loss aside, there is no shortage of benefits to eating healthier: a lower risk of heart disease and cancer, reduced gut inflammation and preventing memory loss later in life, to name a few. A healthy diet may also reduce hearing loss later in life, according to a new study out of Brigham and Women's Hospital.

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Campaigners from Friends of the Earth Scotland gather to demand clean air in August 2015. MAVERICK PHOTO AGENCY / Flickr / CC BY 2.0

Air pollution particles from motor vehicle exhaust have been linked to brain cancer for the first time, researchers at McGill University in Montreal say.

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Screen time has become a regular part of learning and playing that only increases from infancy onward. Jim Bauer / Flickr

Young children who spend too much time looking at smartphones, tablets or television screens may have reduced brain development in areas important for language and literacy, a new study has found.

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According to a new study, sugary drinks make up 34 percent of the added sugars in the American diet. Marlith / CC BY-SA 3.0

Sodas and other sugar-sweetened drinks may taste great, but research has increasingly linked them with obesity and potentially fatal health issues. Now, for the first time, a new study has shown the surprising health benefits of banning the sale of these sugary drinks in the workplace.

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Dairy products are usually the leading source of calcium in Western countries. fcafotodigital / E+ / Getty Images

Ditching cheese, milk and other dairy products for more plant-based foods could reduce your risk of developing prostate cancer.

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During the summer, the Arctic tundra is usually a thriving habitat for mammals such as the Arctic fox. Education Images / Universal Images Group via Getty Images

Reports of extreme snowfall in the Arctic might seem encouraging, given that the region is rapidly warming due to human-driven climate change. According to a new study, however, the snow could actually pose a major threat to the normal reproductive cycles of Arctic wildlife.

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