Day: October 30, 2021

Earth, Atmosphere and Outer Planets Earth is the fourth planet from the Sun and only cosmic object known to host and support human life. Only within the last few million years has Earth had an atmosphere and oceans, both of which are vital for sustaining life. At the present time there are about four billion human beings living on Earth. Earth’s crust is composed of several plates which have been in existence for millions of years. In fact, the presence of such a long history of life on Earth can […]