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Newly discovered ancient creature may have been the heaviest animal ever

By Ashley Strickland, CNN (CNN) — Fossils can appear in the oddest of places. As Earth’s shifting tectonic plates have rearranged continents over time and the planet has by turns cooled and warmed, mountain ranges appeared and glaciers carved paths. Those natural movements, combined with erosion, unearth sedimentary rock that tells stories of a world that existed long before

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100-degree days are becoming more common in the cities where most people live. These charts explain why.

By Christopher Hickey, CNN Hot summer days in the United States have only been getting hotter. In the 25 largest US cities, days with highs breaking the 100-degree Fahrenheit barrier have become more common over the past 75 years, according to airport weather station data from the National Oceanic and Atmospheric Administration. This year is

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