Tuesday, April 27, 2010

News Flash: Earth is Not Like a Cadbury Egg

"Is the Earth's core solid?"
Earth News, Discovery News (April 26, 2010)

"Even if you breezed through a few geology classes in your day, it's easy to think of the Earth's interior like a Cadbury Egg: solid on the outside and molten in the center. Yet we've known for more than 60 years that the very center of the Earth is actually solid.

"Danish seismologist Inge Lehmann made the discovery in 1936 when she noticed seismic waves bouncing off a boundary point deep within what was believed to be a liquid center. With her finding, the world learned that Earth's core is solid at the center and liquid on the outside...."

Okay. I get it. Earth isn't like a Cadbury Creme Egg.

It's an interesting article, though: with a bit of 'what we're pretty sure about so far - and few things we're not so sure about.'

By the way, there's another major environmental crisis. Earth's core is cooling, and won't generate a magnetic field when it freezes.

A few billion years from now.

I shouldn't joke. There may be a PAC soon, advocating sanctions against Iceland for wasting Earth's precious heat. ("How do You Pronounce "Eyjafjallajökull," or "Eyjafjallajokull:" You Know, Iceland's Volcano?" (April 24, 2010)), and all that)

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