A tractor navigates Antarctica's ice sheet to deliver supplies to McMurdo Station, the largest inhabited area in Antarctica. Almost all food needs to be imported to research stations like McMurdo. Only some lichens and mosses grow in the harsh conditions of the ice sheet.

Photograph by Albert Moldvay

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ice sheet
ice sheet Encyclopedic Entry

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An ice sheet is a type of glacier that covers a very large area

vegetation region
vegetation region Encyclopedic Entry

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Scientists divide the Earth’s land into what are called vegetation regions

Antarctica
Antarctica Encyclopedic Entry

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Encyclopedic entry. Antarctica is a unique continent in that it does not have a native population.