The most commonly accepted theory states that there were two main migrations into the area.

One accepted theory posits that empathic arousal initiates an altruistic drive for relieving the distress observed in another person.

One commonly accepted theory suggests that the trap-jaw actually evolved independently at least four different times in ants history.

The most accepted theory, states that the produced heat helps in spreading chemicals that attract pollinators to the plant.

By the mid-19th century, the accepted theory was that lightning produced a vacuum.