There are two main types of volcano - composite and shield. The two types of volcano form in different places and have very different characteristics. Ash released from shield volcanoes often ...

Research suggests that an ancient shoreline helped to sculpt the drop between Mars' southern and northern hemispheres.

He said that the region sits atop a plate boundary where the Earth's tectonic ... Axial Seamount is a shield volcano, which means it's shaped like a shield rather than a steep-sided cone volcano.