Biomes are geographically contiguous areas on the surfaces of celestial bodies. They yield different experimental data (and flavor text). Currently, only Kerbin and Mün have biomes. Taking data at different altitudes (including 'on the ground', i.e. surface samples) over different biomes reveal different Science!
- Ice caps (currently unknown whether north and south yield different data)
- Water (oceans)
- ?Rivers (more research needed)
- ??? Get out there and explore!