Steam rises over the rim of the Kilauea Volcano crater on the Big Island of Hawaii at sunrise. I rose early to catch the ...

Washington, DC resident Mark Stewart shared a series of dramatic photos on Instagram, in which he is seen proposing to his ...

Essentially, gas pistoning is a shallow, degassing-driven rise and fall of a lava surface. Often these pistons occur in ...

Mark Stewart posted a series of just amazing photos on Instagram, in which he gets engaged to his girlfriend, Olivia Post, ...