Define a taiga.

A taiga is a biome that is characterized by cold temperatures and a predominance of evergreen coniferous trees. It is found in the northern regions of North America, Europe, and Asia, and is also known as the boreal forest or snow forest. The taiga is the largest terrestrial biome in the world and has a distinctive ecosystem with a diverse range of flora and fauna. The region has long and cold winters with short summers, and is generally covered in snow for several months out of the year.