What is a caldera crater?

What is a caldera crater? Craters are formed by the outward explosion of rocks and other materials from a volcano. Calderas are formed by the inward collapse of a volcano. Craters are usually more circular than calderas. (Calderas may have parts of their sides missing because land collapses unevenly.) What Read more…

What is presentism simple?

What is presentism simple? Definition of presentism : an attitude toward the past dominated by present-day attitudes and experiences. What are advantages of presentism? Such a formulation of presentism has some important advantages over the standard formulations, as I tried to show: it is homogenous, avoids the question about the Read more…