The fast food chain announced Thursday the introduction of Frosty Swirls, which feature new sauces and Frosty Fusions, including sauces and mix-ins such as Pop-Tarts and Oreo cookies. Frosty ...

Above: A Von Karman vortex street downwind of the Canary Island chain in the eastern Atlantic Ocean off the coast of Africa on Feb. 27, 2015. Image credit: NASA Worldview. Editor's note ...