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Greenland's massive ice sheets contain enough water to raise global sea levels by 23 feet, and a new study shows that they are melting at a rate "unprecedented" over centuries -- and likely thousands of years.The study, published Thursday in the scientific journal Nature, found that Greenland's ice loss accelerated rapidly in the past two decades after remaining relatively stable since the dawn of the Industrial Revolution in the mid-1800s.Today, Greenland's ice sheets are melting at a rate 50% higher than pre-industrial levels and 33% above 20th-century levels, the scientists found.Greenland's melting glaciers may someday flood your city"What we were able to show is that the melting that Greenland is experiencing today is really unprecedented and off the charts in the longer-term context," said Sarah Das, an associate scientist at the Woods Hole Oceanographic Institution and a co-author of the study.To determine just how fast Greenland's ice is retreating compared with the past, scientists used a drill the size of a traffic light pole to take ice core samples.The samples were taken from sites more than 6,000 feet above sea level, giving the researchers a window into melting on the ice sheet over the past several centuries.In the wake of October's dire report from the UN Intergovernmental Panel on Climate Change warning that civilization has just more than a decade to stave off climate catastrophe, Thursday's report spells more bad news for the planet, especially the millions of people living near the world's oceans.Melting from Greenland's ice sheet is the largest single driver of global sea level rise, which scientists predict could swamp coastal cities and settlements in the coming decades.Eight of the 10 largest cities in the world are near coasts, and 40% to 50% of the global population lives in coastal areas vulnerable to rising seas.The study also found that Greenland's ice loss is driven primarily by warmer summer air and that even small rises in temperature can trigger exponential increases in the ice's melt rate."As the atmosphere continues to warm, melting will outpace that warming and continue to accelerate," said Luke Trusel, an assistant professor at Rowan University and study co-author.According to Trusel, the current thought in the scientific community is that there is a temperature threshold that could trigger a point of no return for the eventual melting of Greenland and Antarctica's ice sheets. And though we don't know exactly what that temperature tipping point is, "what's clear is that the more we warm, the more ice melts.""Once the ice sheets reach these tipping points, it's thought that they'll go into a state of irreversible retreat, so they'll be responding to what we do now for centuries and milliennia into the future," Trusel said.What it's like at the ground zero of climate changeDas stressed that although climate science often focuses on the future impacts of warming, the findings show that the climate is already undergoing hugely significant changes."Climate change -- whether it's in Greenland or in your backyard -- is already here and already happening and already impacting people. It's not something that's coming in the future, and this study really drives home that point," she said.The-CNN-Wire? & ? 2018 Cable News Network, Inc., a Time Warner Company. All rights reserved. 3378

HAWTHORNE (CNS) - Southern California-based SpaceX will look to achieve another milestone late Friday evening when it attempts to launch the first test flight of its sleek capsule designed to carry astronauts to the International Space Station.The Crew Dragon, a stepped-up version of SpaceX's Dragon spacecraft that is used to carry cargo to the Space Station, is scheduled for to launch at 11:49 p.m. California time Friday from Cape Canaveral in Florida, propelled by a Falcon 9 rocket. The Crew Dragon mission will be unmanned, testing the new ship's capabilities and ability to self-dock at the Space Station.PHOTO GALLERY: SPACEX ROCKET LAUNCH LIGHTS UP EVENING SKYCargo-carrying Dragon capsules are usually captured by the Space Station's robotic arms and brought into the docking bay. The Crew Dragon is designed to dock and un-dock on its own.The Crew Dragon being launched Friday night will be carrying a sensor- laden mannequin, outfitted in a SpaceX spacesuit, along with about 400 pounds of supplies and equipment. The spaceship is expected to arrive at the International Space Station at about 3 a.m. California time on Sunday.The ship will remain docked at the station until about 11:30 p.m. Pacific time March 7, when it begins its journey back to Earth. It is expected to splash down in the Atlantic Ocean -- slowed by four parachutes -- about six hours later.VIDEO REPORT: No, it was not a UFO. SpaceX launches rocket into space off California coastAssuming the test flight goes well, SpaceX is scheduled to actually launch astronauts into space for a short demonstration flight this summer, possibly in July. NASA has already chosen astronauts Robert Behnken and Doug Hurley for the historic mission. Assuming no issues with that flight, two other astronauts -- Victor Glover and Mike Hopkins -- will later become the first humans carried by a Crew Dragon spacecraft to the International Space Station. 1929

Hillary Clinton says she's "convinced" there was collusion between Russia and members of Donald Trump's team during the 2016 campaign, according to a Monday night interview with USA Today.When asked if she believes that there was collusion by Trump associates with Russians during the campaign, Clinton said: "I'm convinced of it.""I happen to believe in the rule of law and believe in evidence, so I'm not going to go off and make all kinds of outrageous claims," the former Democratic presidential hopeful said. "But if you look at what we've learned since (the election), it's pretty troubling."Ahead of the release of her new memoir, "What Happened," Clinton has been discussing her experiences from the campaign trail and the time following her loss to Trump. 772

HENRICO COUNTY, Va. -- Summer time for middle school students usually means taking a break from lessons and learning, but not for one 11-year-old girl in Virginia.London Hart is actually diving deeper into our country's history and studying recent events, including protests against racial injustice."Back when the protests started after the George Floyd incident, I was having a conversation my with parents about what was really going on and what was happening. They were telling me all about racism," said London.It's a conversation London said was very upsetting."Just because you're a minority, doesn't mean you should be treated unfairly. It made me unhappy that that was happening," said London.So the budding artist picked up her canvas and paintbrush and expressed her support for the Black Lives Matter movement the best way she knows how -- by painting.Then she turned those paintings into t-shirt designs."A bunch of people were really happy that I started this movement with the t-shirts and everybody was buying them and buying them and buying them," said London.London's "Support Shirts" campaign was shared so much online that it blew up."At first, I only expected to sell like 15 shirts at the most. So far, I have 875, raising ,600," said London.London is donating all the money to organizations fighting for racial equality, teaching others you're never too young to get involved with a cause you care about.She even offered some advice to other young people."As long as you know what you're doing and you feel like you know what you're saying and you have something you can support, then I feel like you can stand out and use your voice," said London.London's goal is to raise ,000 this summer.If you would like to buy one of her shirts, click here.This story originally reported by Tyler Layne on wtvr.com. 1840

GREELEY, Colo. – The parents of Chris Watts will get the opportunity to provide victim impact statements at their son’s sentencing hearing Monday but their attorney will not be allowed to address the court, the judge in the case ruled on Thursday.19th Judicial District Court Judge Marcelo A. Kopcow ruled that Cindy and Ronnie Watts should be able to speak in court Monday and deliver victim impact statements in which they could ask the judge for a more-lenient sentence for their son. They can also deliver such statements through a designee, according to the judge’s order.Judge Kopcow wrote that state law affords the two the right to do so because they are the paternal grandparents of Bella and Celeste, whom Chris Watts pleaded guilty to killing in August along with their mother and his pregnant wife, Shanann Watts.But Kopcow ruled that the attorney for the two won’t be allowed to address the court.Cindy and Ronnie Watts spoke for the first time about their son’s case earlier this week, voicing their frustration with the case and questioning the plea deal their son made with Weld County prosecutors, for which he will be sentenced Monday. They also spoke about their negative perception of their daughter-in-law.Shanann’s family responded by calling the Watts’ statements “vicious, grotesque and utterly false” and said “Shanann’s memory and reputation deserves to be protected.”On Thursday, the woman who claims she was having an affair with Chris Watts spoke The Denver Post. She called what happened to Shanann and her daughters “horrific” and said that Chris had “lied about everything” during their relationship and the period between which Chris dumped his wife and daughter’s bodies at an oil and gas site and his arrest.Chris Watts agreed to plead guilty earlier this month to nine counts, including five counts of first-degree murder and other charges, in exchange for being spared from the death penalty.He is expected to be sentenced to life in prison without the possibility of parole at Monday’s sentencing hearing, which is scheduled to begin at 10 a.m. MT. 2114

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