The Mesozoic era is divided into the Triassic, Jurassic, and Cretaceous periods. The Mesozoic era is divided into the following periods from oldest to youngest: Triassic […]
Contour farming is the practice of plowing the land following the topography of the land surface. The practice is used in hilly or even mountainous terrain. […]
he boundary between the Earth’s crust and the underlying upper mantle is now recognised by a significant increase in the velocity of seismic P-waves at depths […]
The first true vertebrates evolved about this time. The first vertebrates (our ancestors) evolved during the Ordovician period. This time period is also known as the […]