Here's why:

* Melting Point: Sulfur has a melting point of 115.21 °C (239.38 °F). This means it's solid at room temperature (around 20°C or 68°F).

* Boiling Point: Sulfur's boiling point is 444.6 °C (832.3 °F). So, it needs to be heated to a much higher temperature to become a liquid.

Therefore, in its natural state, sulfur exists as a solid.