An empty coffee mug, left forlorn on the table. Federal regulators found that "New of Kopi Jantan Tradisional Natural Herbs Coffee" had an ingredient similar to the active ingredient in Viagra. Ezra Bailey/Getty Images hide caption

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A pump jack at work in 2016, near Firestone, Colo. The American Exploration & Production Council, which represents oil and gas exploration firms, is one of many industry groups supporting the HONEST Act, which was passed by the House and is now with the Senate. David Zalubowski/AP hide caption

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David Zalubowski/AP

GOP Effort To Make Environmental Science 'Transparent' Worries Scientists

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Glioblastomas are the most common malignant brain tumor. About 12,000 people in the U.S. are diagnosed with the cancer every year. Sherbrooke Connectivity Imaging Lab/Science Source hide caption

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Sherbrooke Connectivity Imaging Lab/Science Source

John McCain Was Diagnosed With A Glioblastoma, Among The Deadliest Of Cancers

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Northern elephant seals recognize each other's voices based on rhythm and pitch. Nicolas Mathevon/Current Biology hide caption

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Nicolas Mathevon/Current Biology

Threat call of a northern elephant seal

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The morphine-like pain killer Oxycontin is just one of a number of opioids fueling a substance use crisis in the U.S. federal health officials say. And successful treatment for the substance use disorder can be costly. Leonard Lessin/Getty Images/Science Source hide caption

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Leonard Lessin/Getty Images/Science Source

Opioid Treatment Funds In Senate Bill Would Fall Far Short Of Needs

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Arctic sea ice is seen from a NASA research aircraft on March 30, 2017, above Greenland. A top Interior Department scientist who tracks Arctic conditions says he was demoted by the Trump administration for speaking out on climate change. Mario Tama/Getty Images hide caption

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Climate Scientist Says He Was Demoted For Speaking Out On Climate Change

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Piles of plastic waste are pictured on the seaside in the coastal town of Khalde, south of the Lebanese capital Beirut, on September 22, 2016. Joseph Eid/AFP/Getty Images hide caption

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Plastic Is Everywhere And Recycling Isn't The End Of It

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Researchers Examine When People Are More Susceptible To Fake News

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Students Compete In First-Ever International High School Robotics Competition

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An African cheetah (acinonyx jubatus lanea) at Inverdoorn Game Reservein South Africa. Thierry Falise/LightRocket via Getty Images hide caption

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New Research Suggests Why Mid-Sized Animals Are The Fastest

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