Here's why:

* Alkanes and Boiling Point: The boiling point of alkanes increases with the number of carbon atoms in the molecule. This is because larger molecules have stronger van der Waals forces between them, requiring more energy to break apart and vaporize.

* Methane's Structure: Methane is the simplest alkane, consisting of one carbon atom bonded to four hydrogen atoms. Its small size and minimal intermolecular forces result in a very low boiling point.