The global ocean comprises five oceans: the Pacific, Atlantic, Indian, Arctic and Southern oceans. Although it covers more than 70% of Earth’s surface, over 80% remains unexplored, and only 5% of the ocean floor has been mapped. Challenger Deep, in the Mariana Trench in the Pacific Ocean, is the deepest point […]
Life on Earth has changed considerably through geological time. Compared with the many millions of years of Earth’s history and the succession of species that have inhabited it, human society is relatively recent. Palaeontology is the science that studies past life. […]
