Connect your daily life experiences with specific points in a reading using a Double Entry Diary.
Developing plate tectonics theory took several decades and the work of many scientists. Continental drift was formulated by Alfred Wegener and seafloor spreading was developed by many scientists, including Harry Hess.
Norway is very far north and has enormous petroleum reserves. The geologic history of the region explains why and how these two things came to be.
When North and South America joined at Panama, animals that had been separated for millions of years were in contact. North American mammals, which gave live birth, outcompeted the South American marsupials.