Name the single land mass from which different continents have originated

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks for the name of the single landmass from which all continents originated.

2. **Historical Context**: In geological history, it is believed that all continents were once part of a single large landmass.

3. **Identifying the Landmass**: This single landmass is known as "Pangaea."

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