7 weeks 17 min
Blog Posts Tagged "Earth history"
Submitted by JR junior on Mon, 05/16/2011 - 17:56
Last time, I explained that one reason the crust we are drilling in is called “superfast” is because, at a spreading rate of 20 cm a year, it spread much quicker than most seafloors spread. Still, it probably sounds weird to call something superfast that every snail on Earth can outrun.