第504篇Early Ideas about Deep-sea Biology

第344篇Energy Distribution in Plants

085Origins of the Megaliths讲解

The Radiocarbon Dating of Prehistoric American Sites     Because all living things contain carbon, artifacts and organic remains from archaeological sites can often be d...

第195篇Individual Performance and the Presence of Others

TF阅读真题第667篇Early Native American Cultures

001Artisans in Sixteenth-Century Europe讲解

第239篇Early Life-forms and Earth’s Atmosphere

第432篇The Origin of Petroleum

第497篇Alfred Wegener’s Theory of Continental Drift