The biggest cities to ever exist
For the first time in human history, a majority of people live in urban environments. The world's largest cities today fall under a class that researchers call "…
First Olympic Appearance: 1964 by Gerry Brown and Mark Zurlo Related Links Olympics Overview 20122008 Summer Games: VolleyballEncyclopedia: Volleyball Did You Know?Volleyball was invented…
Bring on the MachinesWeatherLet's See How It's DoneNow for the Real WorkGoing Into the Upper AirBring on the MachinesWhat About the Five-Day Forecast? Computers make forecasting easier, although not…
(Encyclopedia) Chavín de HuántarChavín de Huántarchävēnˈ dā wänˈtär [key], archaeological site in the northeastern highlands of Peru, near the headwaters of the Marañon River. It flourished between c…
Fast Facts on Sharks How is a shark different from other kinds of fish? by Holly Hartman Sharks are fish. But how is a shark different from other kinds of fish? Most other fish have…
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