Meet Mercury, the solar system's incredibly shrinking planet

[n2doc]

The smallest planet in our solar system is getting even smaller.

Mercury, the first scorched rock from the Sun, has contracted into itself even more than previously thought over the past 4 billion years, according to new research using images from NASA's MESSENGER spacecraft.

The proof is in its stretch marks.

Looking at tectonic features like wrinkle edges and rounded cliffs (similar to wrinkles on our skin), researcher determined Mercury has shrunk up to 8.6 miles in diameter over the course of several millennia.

The shrinkage is a result of the huge temperature difference between Mercury's core and its surface.

more

http://www.globalpost.com/dispatch/news/science/140317/meet-mercury-the-solar-systems-incredibly-shrinking-planet

[COLGATE4]

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