When does rigor mortis begin after death?

Explanation

**Step-by-Step Solution:**

1. **Understanding Rigor Mortis**: Rigor mortis is a post-mortem condition characterized by the stiffening of muscles due to sustained contractions. It is an important process that occurs after death.

2. **Timing of Rigor Mortis**: Rigor mortis typically begins to set in approximately 2 to 6 hours after death. This timeframe can vary based on several factors, including the environment and the condition of the body.

3. **Duration of Rigor Mortis**: Once rigor mortis begins, it can last for a period of 24 to 84 hours. After this time, the stiffness will gradually decrease as the body undergoes further decomposition.

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