DNC chair candidates spar on future of party as race tightens
The two most prominent candidates to lead the Democratic Party appeared to agree with each other on most of the issues in a CNN debate Wednesday night, while outsider candidates and the moderators needled them about how sharply the party should focus on President Donald Trump and whether sitting Democratic officeholders should be primaried in 2018.
Iowa pig farmer to Sen. Grassley: You?re going to create ?one great big death panel? by repealing Obamacare
Farmer Chris Peterson pleads with Sen. Chuck Grassley in Iowa on Tuesday. Republican lawmakers returning home this week to host town halls are being greeted by overflow crowds filled with angry voters and protesters demonstrating against President Trump?s polarizing policies.
Cop's Home, Truck Vandalized After Viral Video Shows Him in Confrontation With Teen and Firing Shot
What killed Kim Jong Nam, who did it and why still not known
SEOUL, South Korea (AP) ? More than a week has passed since the North Korean leader's estranged half brother died in Malaysia, but what killed him, who instigated it and why are still unknown. Malaysian authorities have identified several suspects in the death of Kim Jong Nam, but many questions remain.
Le Pen top aide put under formal investigation
The chief of staff of French far-right leader Marine Le Pen was put under formal investigation on Wednesday after a day of questioning over the alleged misuse of EU funds to pay parliamentary assistants, a judicial source said. Catherine Griset was taken into custody for questioning along with Le Pen's bodyguard Thierry Legier, who was later released without being put under investigation, according to the source. In reaction to the news, Le Pen said that she formally denied any wrongdoing in a case that she said was being used to undermine her campaign.
Here's what the Ice Age tells us about future sea level rise
A new study on an ancient ice sheet may hold important clues about our planet's future. The research focuses on the Laurentide Ice Sheet, the massive expanse covering North America during the last Ice Age, which ended about 10,000 years ago. A team of scientists found that small spikes in the temperature of the ocean ? not the air ? likely caused periods of rapid melting and splintering of the ice. SEE ALSO: This 'GOT' star teamed up with Google to capture Greenland's melting ice Their findings add to a growing body of evidence that climate change could ultimately drive sea levels even higher than today's models predict, according to the study published Feb. 15 in the journal Nature. Glaciers in Greenland, Antarctica and other areas have been melting rapidly in recent years due in part to increasing ocean temperatures. "It is possible that modern-day glaciers ... are more sensitive to ocean warming than we previously thought," said Jeremy Bassis, the study's lead author and an associate professor of climate and space sciences at the University of Michigan. Ice floats near the coast of West Antarctica as viewed from a NASA research aircraft. Image: Mario Tama/Getty Images For the study, Bassis and his colleagues looked at so-called Heinrich events: the periods during which the Laurentide Ice Sheet would rapidly disintegrate. Roughly every 8,000 years, the ice sheet's edges would break off, sending a vast armada of icebergs flowing into the Atlantic Ocean. The icebergs carried sediment from around Canada's Hudson Bay and deposited the dirt on the ocean floor. They also boosted sea levels by more than 6 feet over the course of hundreds of years. What triggered these Heinrich events has largely befuddled scientists. The rapid melting periods occurred during the coldest times of the last Ice Age ? exactly the opposite of what you'd expect during a major ice melt. Image: university of michigan To determine why the ice melted despite the cold air temperatures during these times, the University of Michigan team focused on the role the oceans played, studying ice core and ocean-floor sediment records to estimate how temperatures varied over thousands of years. They also used Bassis' mathematical model for describing how ice reacts to air and ocean temperatures, and the implications for sea level rise. The scientists next created simulations of the timing and size of the massive Laurentide melting events. They found that even small changes in sub-surface ocean temperatures ? of just 1 degrees Celsius, or 1.8 degrees Fahrenheit ? could lead to sea level-boosting Heinrich events. "Warm warm ocean water that's just tickling the edge of the ice sheets can trigger these catastrophic [ice] retreats that could last for centuries," Bassis said. The Nature study supports earlier findings that warmer North Atlantic water temperatures may have set the Heinrich events in motion. Image: university of michigan A 2011 study led by Shaun Marcott of the University of Wisconsin proposed that, thousands of years ago, sub-surface warming likely destabilized the ice and caused ice shelves to collapse near the Hudson Strait, which links the Hudson Bay to the Atlantic Ocean. The Nature study also lends further credence to the idea that Heinrich events reflect what's happening today on the rapidly melting Greenland and Antarctic ice sheets, said Richard Alley, a professor of geosciences at Penn State University, who was not involved in the new research. Alley co-authored a 2015 paper that concluded that ? based on the Ice Age's events ? changes in ocean temperatures could drive future sea level rise even before the air grows significantly warmer in Antarctica. Unlike in the past, when air and ocean temperature shifts were natural in origin today's oceans are warming largely due to human-driven climate change. More than half of the increase in global ocean heat content has occurred in the last two decades, according to the National Oceanic and Atmospheric Administration (NOAA). Image: U.S. environmental protection agency "This new paper is a nice demonstration supporting earlier hypotheses that ice sheets are highly sensitive to warming in the surrounding water, as well as to warming in the air," Alley said. It also shows "that predicting the future of the ice sheets will mean understanding the changes in the ocean and the air," he added. For Peter Clark, however, the fact that Wednesday's study only affirmed earlier conclusions meant the researchers didn't actually offer new evidence that future sea levels may be higher than we're predicting. "Current models may be underestimating future sea level rise, but the results of this new paper don't give us any reason to think that this is the case," said Clark, an earth, ocean and atmospheric sciences professor at Oregon State University. BONUS: Leonardo DiCaprio's new film 'Before the Flood' says we can fix global warming
Why Did People on Medicaid Vote for Trump?
Here?s a question that?s baffled health reporters in the months since the election: Why would people who benefit from Obamacare in general?and its Medicaid expansion specifically?vote for a man who vowed to destroy it?
ISIS Can 'Threaten' Planes: US Military
Women in sports ad strikes nerve in Arab world
An online commercial released by Nike this week that showed Arab women fencing, boxing and spinning on ice-skates has stirred controversy over its attempt to smash stereotypes about women leading home-bound lives in the conservative region. Maybe they'll say you exceeded all expectations." Within 48 hours the video was shared 75,000 times on Twitter and viewed almost 400,000 times on YouTube. "An ad (which) touches on the insecurities of women in a society digs deeper and becomes an empowerment tool rather than just a product," Sara al-Zawqari, a spokeswoman for the International Red Cross in Iraq, wrote on her Twitter page.
Last stand for Standing Rock
Protesters opposed to the Dakota Access pipeline braced for a showdown with authorities as some vowed to defy Wednesday?s deadline to abandon the camp they have occupied for months to halt the project. President Trump has pushed for the completion of the multibillion-dollar pipeline since he took office last month, despite objections from Native Americans and environmental activists who say it threatens the water resources and sacred land of the Standing Rock Sioux Tribe. Republican Gov. Doug Burgum and the U.S. Army Corps of Engineers set a deadline of Wednesday afternoon for protesters to leave the Oceti Sakowin camp.