What is the meaning of all history is contemporary history?

Who discovered Yemen? Who composed the theme tune for the Harlem globetrotters? Is Jernigan an Irish name? What are some antonyms of the word alfooness? What is a basic principle? How important was artillery in the US Civil War Battle of Shiloh? What was the naval race? What policy did George Washington develop in regards to foreign nations? What is the Symbolic meaning of the Gecko for native Americans? Why was the Roman Empire divided in half during the 3rd century A.D.? Which religious group wanted to purify the Church of England? Did the Samurai ever invade Korea? How does a deep-ocean trench form? What countries did Russia have control over? Five steps that lead to reformation? Which external enemy proved to be the greatest continuing threat to the Byzantine Empire in the 15th century? Who was the leader who called for rugged individualism during the Great Depression? Who was Sir John Yeamans? Did the ancient Olympics have the five rings? Who was the winner of the Battle of Bunker Hill?