Main Groups:
Crustaceans
<span>Insects </span>
<span>Arachnids </span>
<span>Myriapods(centipedes & millipedes) </span>
<span>Characteristics:
Exoskeleton
6+ legs
Jointed appendages
</span>
I think the answer is technology.
For example, since the development of satellite technology which could observe the world from above in the form of 2-dimensional picture, Geography could be developed into other things such as weather predictions, taking care of space objects, etc.