Grasshoppers are amongst the most ancient living groups of chewing herbivorous insects dating back to the early Triassic period around 250 million years ago. When they are forced to crowd together due to environmental changes, they will transform into locusts which swarm in the millions and destroy crops over wide areas.
You could probably collect enough Metal Earth spacecraft to make a timeline of our progress. It's pretty neat to see how far we've come, and imagine how much farther we have to go.