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![Split image of volcano and extreme winter storms](https://cdn.mos.cms.futurecdn.net/fWBeK7oEnNxMqB5mnWJnQi-320-80.jpg)
Polar vortices and volcanoes undersea
By Pandora Dewan published
Science news this week Jan. 3, 2025: Our weekly roundup of the latest science in the news, as well as a few fascinating articles to keep you entertained over the weekend.
![A stock image of a young woman walking through a snow storm.](https://cdn.mos.cms.futurecdn.net/EC5nLjLmoUS2rieoBkvHfP-320-80.jpg)
Polar vortex could bring deadly winter storms and coldest weather in more than a decade to US
By Patrick Pester published
An expanding polar vortex is expected to lower temperatures across the eastern half of the U.S., with the potential for record-breaking cold in January.
![a couple wearing rain jackets with an umbrella walking in the rain in the forest](https://cdn.mos.cms.futurecdn.net/gDPYWBibitcpjL7GohhyX8-320-80.jpg)
What does a weather report of 30% chance of rain mean?
By Hannah Loss published
A percent chance of precipitation shows the probability there will be at least 0.01 inch of rain, snow or sleet at a given location.
![A satellite image of a light scribble-shaped scar over a dusty landscape](https://cdn.mos.cms.futurecdn.net/xMLSoAuRnvABnTa57ZvaQ3-320-80.jpg)
Huge, 7-mile scar torn across Australia's Nullarbor Plain discovered by caver scouring Google Earth
By Matej Lipar published
After the caver noticed a giant gash across a barren landscape, scientists discovered it was created by a ferocious tornado that no-one knew had occurred.
![NOAA GOES-WEST satellite captures the bomb cyclone moving east across the Pacific toward the West Coast.](https://cdn.mos.cms.futurecdn.net/GiQ2bY5nkikNBLrsfPzjwf-320-80.gif)
'Bomb cyclone' bringing high winds to West Coast seen from space in stunning timelapse
By Ben Turner published
A low-pressure system will bring extreme gales and heavy rain to the West Coast over the next three days.
![map showing bomb cyclone heading to US West Coast](https://cdn.mos.cms.futurecdn.net/pJdKyPRHjNnwRZuf53y4zJ-320-80.jpg)
West Coast bracing for 'bomb' cyclone
By Stephanie Pappas published
A low-pressure system headed for Northern California and Oregon is likely to bring extreme rain and strong winds.
![A man stands in a beautiful winter landscape with trees covered in snow](https://cdn.mos.cms.futurecdn.net/59uc8FWTCBmLwr7uJzf765-320-80.jpg)
Why isn't the darkest time of the year also the coldest?
By Charles Q. Choi published
Why aren't the solstices the coldest and hottest days of the year?
![a satellite photo showing a sea of muddy water covering a large city by the coast](https://cdn.mos.cms.futurecdn.net/irPGsp9cthzxYiXJn5JDDk-320-80.jpg)
Watch Valencia disappearing under a sea of mud during deadly Spanish floods
By Harry Baker published
Earth from space Satellite images show the true extent of the flash flooding in Valencia during a freak weather event that killed at least 214 people across Spain.
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