What is the life expectancy of the hamsters? And what is their natural habitat? Have some of them developed as a result of humans breeding them for certain characteristics or are these 'natural' types?
For Syrian hamsters, the life expectancy is 2-3 years. For dwarf hamsters the life expectancy is 1-2 years.
In the wild hamsters live in central europe and northern asia. Most commonly in Russia, Siberia, Syria, China, and Mongolia.
In that range they inhabit pretty much anywhere including, deserts, mountains, and forests.
The only really big difference between pet and wild hamsters is that pet hamsters have more coat colors, patterns, and types other than the natural coat type and color.