American geography and environment – Native Americans
North American environment: The north Most of North America was (and is) just not very good for people to live in. That's why not that many people lived in North [...]
North American environment: The north Most of North America was (and is) just not very good for people to live in. That's why not that many people lived in North [...]
Ice chemistry: Perito Moreno glacier, Argentina (thanks to Argentina's Travel Guide) How water freezes into ice When water gets colder than 32 degrees Fahrenheit or zero degrees Celsius, it freezes [...]