Earth Changes
The official temperature in Athens sank to 20 degrees, breaking a record set in 1891, said Frank Taylor, spokesman for the National Weather Service office in Peachtree City.
Several roads have been closed in northern Scotland after heavy snow made driving conditions treacherous.
Snow showers are spreading down eastern England, affecting north Yorkshire, Lincolnshire, Norfolk and Suffolk. Snow could hit more areas on Sunday.
Drivers are being warned of black ice on roads, with snow and rain due to fall on frozen surfaces overnight.
Luciana Möller of the Marine Mammal Research Group at Macquarie University in Sydney, Australia, and her colleagues were studying populations of what they thought were Indo-Pacific and common bottlenoses in southern waters.

The Southern Australian bottlenose dolphin is only the second new dolphin to be discovered in 50 years.
DNA analysis, though, revealed that most the animals living close to the shores of the states of Victoria, South Australia and Tasmania were in fact a new species, belonging to a new genus. "They look very like the Indo-Pacific species, but genetically they're very different," says Möller.
In another, a large mountain lion crept along a creek, searching for a way across without getting wet.
Then there was the phantom creature that snuck right behind the wildlife biologist and his camera, then disappeared - but only for a moment. In another episode, a bear, the Holy Grail of "critter cams," hovered over a salmon pool on a remote creek, then out-quicked the camera.
A "critter cam," also known as a "trail cam," can unveil the wildlife secrets of forests, streams and lakes. These are movement-activated cameras strapped to trees, or fixed video cameras positioned at strategic locations on land and underwater. They are like having hidden eye-witnesses in the wilderness.

Map of Australia locating Brisbane, where flash floods killed one person and forced evacuations days after the city was hit by a violent storm, according to officials.
The 85-year-old died when she was trapped in her car as it was swept away by floodwaters east of the Queensland state capital, police said. Her elderly husband was recovering in hospital.
More than 1,000 calls were made to emergency services in Brisbane and surrounding areas on the east coast, which were pounded by up to 25 centimetres (nearly 10 inches) of rain over seven hours overnight.
Thousands of homes were plunged into darkness and families were evacuated from houses threatened by a landslip workers had been trying to stabilise after Sunday's storm, said state Emergency Services Minister Neil Roberts.
The Federal Emergency Management Agency said if earthquakes strike in what geologists define as the New Madrid Seismic Zone, they would cause "the highest economic losses due to a natural disaster in the United States."
FEMA predicted a large earthquake would cause "widespread and catastrophic physical damage" across Alabama, Arkansas, Illinois, Indiana, Kentucky, Mississippi, Missouri and Tennessee -- home to some 44 million people.
Tennessee is likely to be hardest hit, according to the study that sought to gauge the impact of a 7.7 magnitude earthquake in order to guide the government's response.
The extreme cold air pouring out of the high Arctic is trailing a weak clipper system that moved into the mid-Atlantic region Thursday. The cold air is spreading across much of the country east of the Rockies, but the core of the cold will be in the Midwest and the Northeast.
Temperatures into the weekend will be as much as 20 degrees below normal, while strong winds will create RealFeel® temperatures that will feel even colder.
The Midwest Regional News story reports that a weak Alberta Clipper moving into the Upper Midwest today will spread the next wave of arctic air into the East by this weekend, while sparking the next round of lake-effect snow to the lee of the Great Lakes.
Today, residents in the East woke to sub-freezing temperatures across the region. According to the East Regional News story, lows early this morning plummeted into the 20s across a good portion of the eastern third of the nation.
The frigid readings this morning not only set a record for the date, but it marked the earliest ever that the temperature has fallen below 20 degrees in Charlotte.
Forecasters say we will moderate slightly over the next two days, but another shot of cold air is headed for the region late Thursday into the weekend.
The unofficial low this morning at Charlotte/Douglas International Airport was 18 degrees. That broke the mark of 20 degrees for the date, set in 1951. Before today, the earliest sub-20 reading in Charlotte was on Nov. 20, 1951.

Sierra Nevada, Europe's most southerly resort, had its earliest opening for 20 years at the weekend when more than 7000 skiers took to the slopes of Europe's most southerly resort.
The resort, one of Europe's highest, had planned to open this weekend but decided to open early following heavy snowfall. This led to a snow depth of 20 - 50cms (8 - 20 inches) of freshly fallen powder.