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Sharks are known to stalk and sniff out prey before they attack. But all this newly discovered shark species has to do is glow in the dark, and the prey comes to them.The 5 1/2-inch American Pocket Shark is the first of its kind to be discovered in the Gulf of Mexico, according to a new 299

RACINE, Wisc. — District Attorney Patricia J. Hanson of Racine County has decided not to bring charges against the Mount Pleasant police sergeant involved in the 174

Schools in the greater Denver area will be closed Wednesday as authorities search for a woman whom they described as armed and "infatuated" with the Columbine mass shooting days before the 20th anniversary of the attack.Local, state and federal officials are searching for Sol Pais, 18. She made "credible" -- but unspecific -- threats after traveling from Miami to Denver on Monday night, and is considered dangerous, said Dean Phillips, the special agent in charge of the local FBI office.After she arrived, she immediately went to a store and bought a pump action shotgun and ammunition, the FBI said Tuesday night.Pais is considered a threat to the community and schools, but there is no information on any specific threat to a particular location, Phillips said.Nearly 20 school districts will be closedNearly 20 school districts in the greater Denver area will be closed Wednesday due to security concerns just days ahead of the 20th anniversary of the Columbine High School shooting.They include the Douglas County School District , Aurora Public Schools, Jefferson County Public Schools and Cherry Creek Schools. Columbine High School is in Jefferson County."There are many people that work diligently day in and day out ... that are making the very best decisions they can for the sake of the kids who are in schools each and every day," said Jefferson County Sheriff Jeff Shrader. "We want our schools to be a safe place for kids to learn."The Colorado Department of Education recommended that Denver area schools conduct lockouts and controlled release Tuesday after the alleged threats.In a lockout, exterior doors are locked, and school continues as normal.Columbine High and several schools in the area were part of the lockout, the Jefferson County Sheriff's Office tweeted.She was last seen wearing camouflage pantsAfter Pais arrived in the state Monday and purchased a pump action shotgun and ammunition, she went to the foothills, where she was last seen, Phillips said."Her comments, her actions that we have heard about from others tend to cause us great concern that she may pose a threat to a school," he added.Officials released an image of Pais. She is about 5-foot-5 and was last seen wearing a black T-shirt, camouflage pants and black boots, authorities said.Authorities said they are being especially cautious because Pais' statements don't express a specific plan and were mostly spoken."She did make statements that were threatening to schools and she did purchase a firearm ... and that's why she's a credible threat," said Patricia Billinger, a spokeswoman with the Colorado Department of Public Safety.Anniversary of Columbine shooting is this weekThe 20th anniversary of the shooting at Columbine High School is days away.On April 20, 1999, two students killed 12 of their schoolmates and one teacher in a mass shooting at the high school in the town of Littleton -- about 10 miles from Denver."I know that this opens a wound, especially on an anniversary week, for those families who were most deeply impacted by this," Shrader said.At this point, there might not be enough probable cause to arrest Pais, but the federal and state attorneys' offices are working to develop appropriate charges, Phillips said. He said once they detain her, they will hold her for as long as they legally can.Authorities are asking for the public's help finding her, and tips can be sent to the tip line at (303) 630-6227 or emailed to denverfbitips@fbi.gov. 3486

Science says humans are the driving force behind climate change. But we have to go back centuries to get an idea of how we got to where we are today.In the 1600s, people started using coal for fuel more often than wood. It was more widely available and produced more energy.The industrial revolution was a turning point. That’s when America started burning more fossil fuels for energy.By the early 1800s, people were using high-pressure boilers to fuel coal-powered engines. That included trains, steamboats, and ships.The first theory of human-caused climate change came about in 1838. A physicist proposed that water vapor and carbon dioxide could trap heat in the earth's atmosphere.Then, in 1876, a Russian scientist observed that - since the industrial revolution - Siberian glaciers started melting.Scientists say much of that water ended up in the ocean and raised sea levels.Sea levels are between five and eight inches higher today than they were in 1900.Some climate change critics argue temperatures are going down in some places.Scientists say that's somewhat true but that, overall, earth's temperatures are on the rise.Critics also argue humans aren't behind climate change.Scientists say there's a direct correlation between human carbon emissions and rising temperatures.Some scientists believe our "right now" culture will make the crisis worse. They say things like same-day delivery and frequent air travel could all put more carbon into the atmosphere. That the carbon traps heat that then warms the earth. 1539

Sen. Kirsten Gillibrand officially jumped in the 2020 presidential race on Sunday by declaring her Democratic candidacy with a campaign video titled "Brave Wins."The New York Democrat launched an exploratory campaign in January, announcing it on CBS' "The Late Show with Stephen Colbert," and has spent the past two months traveling to key states.Toward the end of the 381