What is mya?

Your query is quite broad, and "mya" could refer to several different things, depending on the context:

1. Million Years Ago: Often abbreviated as "mya," it's a term used in geology and paleontology to specify a point in time before the present day. It's commonly used in discussing Earth's geological history and the development of life on the planet.

2. Mya (Bivalve): Mya is a genus of soft-shell clams that are found in marine or brackish water environments. They are known for their elongated oval shells and are often harvested for food.

3. Mýa (Singer): Mýa Marie Harrison, known professionally as Mýa, is an American singer, songwriter, and actress. She gained fame in the late 1990s with hits like "It's All About Me," "Case of the Ex," and her collaboration on "Lady Marmalade."

4. Mya (Given Name): Mya can be a given name for individuals and might be derived from variations like Mia or Maya. It's a name used in numerous cultures.

If you have a specific context in mind, please provide more details so I can give more targeted information!