Phase IV - 1974 - 6/10

In the Arizona desert, a colony of ants is rapidly evolving.
They have built large towers, similar to termite structures in Africa.
Moreover, they are breeding themselves immunity to pesticides.
The local human population has fled, leaving a trio of researchers.
For those who predict the meek shall inherit the earth, this is a good one.
For those prefer picnics and backyards ant free, this will be a nightmare.
Numerous closeups of invading insects, for those who suffer ant-phobia.