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Letters Home from Yosemite
a great mass of ice that moves very slowly down a mountain or along a valley, or spreading very slowly over a land area
able to impress the mind, feelings, or conscience
a person who studies living things
to keep from harm or change; protect
land that goes up or down at an angle
a set of related living things that share certain characteristics and that can interbreed
a wild region with few or no people living in it
heights above Earth
things that are formed
a place where water is collected and stored for use