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Authorities say at least four people have died after severe storms swept across parts of the U.S. South. Three people were killed in Louisiana, including an elderly couple found near their trailer home Saturday by firefighters.In Texas, one person died when a car flipped into a creek. Tornadoes have destroyed homes in Arkansas and Missouri and also caused damage in Oklahoma. The storms also unleashed downpours that caused widespread flash flooding. Weather forecasters issued tornado warnings for parts of Mississippi. 534

As if one winter storm around the holidays wasn't enough, a new one is taking shape for New Year's Eve, bringing more heavy rain and a renewed flood threat.It comes on the heels of the deadly storm system that plagued much of the Midwest, South and East over Christmas.The worst is over as that storm pushes offshore into the Atlantic. But it killed at least six people in the Midwest and South and brought blizzard conditions, a foot of snow, and winds exceeding 55 mph to the Great Plains and Upper Midwest on Thursday. It then ripped across the East with heavy rainfall and winds.On Friday, more than 50 million people were under the threat of floods, with flood watches and warnings stretching from the Gulf Coast to New Jersey.Flash flooding affected Southern Mississippi and Alabama, triggering dangerous situations and high-water rescues. Up to a foot of rain fell in less than a day.The rough weather made holiday travel even more of a headache. There were nearly 9,000 flight delays into, within or out of the country Friday, according to flight-tracking site 1081

Bird populations in the United States and Canada have dropped by 29% since 1970, signifying 2.9 billion birds lost in almost 50 years, according to a new study.The scientists involved in the study warn that like a canary in a coalmine, birds reveal environmental health. This steep loss of bird populations, including some of the most common birds like sparrows and finches, shows that human impacts on the continent's environment mean it can no longer support the wildlife systems it once did.Normally, it's hard to track animal populations this way. But birds are much easier to monitor. The study combines almost 50 years of data, including information collected by citizen scientists and weather radar data of migratory birds from 143 stations across North America. Observations by people were shared with the North American Breeding Bird Survey at the US Geological Survey, the Canadian Wildlife Service, the Audubon Christmas Bird Count and Manomet's International Shorebird Survey."Citizen-science participants contributed critical scientific data to show the international scale of losses of birds," said John Sauer, study co-author at the US Geological Survey. "Our results also provide insights into actions we can take to reverse the declines."The study was published Thursday in the journal 1315

Arizona, Florida and Illinois will hit the polls Tuesday for their presidential primaries, a day after Ohio Gov. Mike DeWine defied a judge's order and closed the elections, citing public health concerns amid the COVID-19 pandemic.There are 577 Democratic delegates at stake during Tuesday's primaries, with Florida marking the most significant prize with 219 delegates. According to 396

Astronomers have detected the most massive neutron star ever, and it almost shouldn't even exist.Neutron stars are the smallest in the universe, with a diameter comparable to the size of a city like Chicago or Atlanta. They are the leftover remnants of supernovae. But they are incredibly dense, with masses bigger than that of our sun. So think of the sun, compressed into a major city.In the case of the newly detected neutron star, dubbed J0740+6620, it's 333,000 times the mass of the Earth and 2.17 times the mass of the sun. But the star is only about 15 miles across. It's 4,600 light-years from Earth.This is close to the limit of how much mass a compact object can contain before it crushes itself into a black hole.The neutron star itself is rapidly spinning, which is called a pulsar because they send out beams of radio waves from each magnetic pole. The beams mimic the sweeping motion of a lighthouse beam, hence the name "pulsar."Pulsars act like atomic clocks because they regularly pulse, so astronomers can use them to study space and time.The star was detected by the 1098