So Marker kept working at the Wildlife Safari and partnered with the Smithsonian Institution's National Zoo to research ...

Before sunrise on school days, 7-year-old Laike Glesne used to lug his backpack from a Chicago public bus to a train and then ...

A new study offers the most detailed glimpse yet of how Earth's surface temperature has changed in the past 485 million years ...

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Near Peru's coast lies Caral, which existed as Egyptians were building the pyramids, and is the first known ancient city of ...