The existence of a single original continent has been proven by the presence of:

According to the continental drift theory ( evolution theory) the earth initially existed as one continent before drifting and moving apart to their current positions. This theory is accounted for by discovery of identical fossils in south america and Africa showing that the two were once one big land mass together with other continents. In addition discoveries of presence of identical fish species in different waters in long separated lakes of various continents also supported the existence of a single original continent. 

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )