A powerful Polar Vortex in the stratosphere brings frigid temperatures to US
The polar vortex's blast of Arctic air from Canada brought the season's coldest weather to the majority of U.S. The vortex is ...
Dinosaurs may have roamed the northern hemisphere millions of years earlier than previously thought
How and when did dinosaurs first emerge and spread across the planet more than 200 million years ago? That question has for ...
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Winter solstice 2024 brings shortest day of the year to Northern Hemisphere today
The winter solstice is today, bringing the shortest day and longest night of the year to the Northern Hemisphere. As the official start of the astronomical winter, the sun reaches its most ...