If you could drive straight down, into a tunnel bored through the crust of the planet, you’d hit this molten mess in about an hour. It’s called the asthenosphere – a sluggish sea, several hundred miles thick, on which floats the Earth’s cool epidermis – the so-called tectonic plates. — Seth Shostak

Tags: #Sea, #Earth, #Tunnel, #SethShostak, #American, #Scientist

Mini who’s who:

Seth Shostak : American Scientist