Evolution Has Its Limits

Recent study by Queen's University shows that species have their evolutionary limits. They evolve till they hit their evolutionary limits.
Biology professor Chris Eckert says
“Our results show that evolution can happen quickly when plant and animal species are colonizing new parts of the globe, and humans are causing this to happen at a phenomenal rate. Every species has geographical range limits, but we don’t know why.”
Study was based on purple loosestrife, an invasive plant species brought to Canada from Eurasia in the early 1800s.

Read original study here.