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With a decreasing population of lake sturgeon, nine states have listed the species as endangered. To protect them, scientists are studying where lake sturgeon travel before and after they reproduce.

While most Democratic presidential candidates support the goals laid out in the Green New Deal, they differ on specifics like a carbon tax, nuclear energy and federal spending to fight climate change.

The U.S. space agency and the South Korean government teamed up for the most ambitious study of Korean air quality to date and found the majority of the toxic air is homegrown, and not from neighbors.

In addition, most falsely believe the president needs congressional authorization to launch a nuclear strike. North Korea's renegade program will be a major focus at this week's U.N. General Assembly.

For much of his career, the actor represented many different things to many people, but a constant was his sheer artistry.

Robert Adams' obsession with the decay and beauty of the American landscape is on display at the National Gallery's exhibition "American Silence: The Photographs of Robert Adams."

Republicans are taking one last shot at repealing and replacing the Affordable Care Act, also known as Obamacare. But the new plan isn't much different from the last one that failed.

Rose-Lynn Fisher spent a decade magnifying and photographing her tears, learning the nuances of her emotions in the process. The project is called The Topography of Tears.

Democrats are unified against President Trump's immigration stances, but many do not have clear positions on specific policies related to border security and immigration levels.

President Trump has taken dramatic action on trade. His potential 2020 rivals are on the record about what they would do regarding tariffs and trade deals that could dramatically impact the economy.