The most recent supervolcanic eruption on Earth occurred approximately 27,000 years ago, during the Stone Age, when early humans were still fashioning tools and decorating cave walls. This ...

New research has discovered an extinct relative of modern humans known as Homo naledi buried their dead and engraved cave walls around 250,000 years ago. The discovery is a surprise as it changes ...

The first Homo sapien outside Africa was discovered in a Greek cave. Public Domain/University of Tübingen A partial skull found in a cave in Southern Greece is the earliest evidence of the presence of ...

Thomas included KNO 3 in an article about the action of hydrogen chloride gas on various metal salts. As early as 300 BCE, KNO 3 was found on cave walls or other rocky surfaces. Until World War I, it ...