The Pilgrims were a English Separatist congregation that emigrated to Holland in 1608 to escape religious persecution. Twelve years later, discouraged by economic conditions, the congregation voted to move again, this time to America. A small ship, the Speedwell, carried …[Continue]

Ten centuries ago, Vikings lived in northern Europe, in an area that now includes Denmark, Norway and Sweden. Vikings were infamous pirates and warriors, terrorizing Europe for hundreds of years. But warfare was not their only pursuit. They excelled on …[Continue]

Plate tectonics theory, formulated in the 1960s and 70s, states that the Earth’s outer crust is composed of moving plates. For example, two hundred million years ago there was only one super continent named Pangaea. Plate tectonics also explains how …[Continue]