TWiDN: Cats Make Us Healthier, Dogs Too!

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This week Trace talks about how cats are good for us! Seriously! They help build immunity and are good for mental health.

Plus, he explains about how Amelia Earhart's plane might be sitting out of reach on the bottom of the Pacific, and how Earth and Mars both quake due to plate tectonics.

LINKS TO THIS WEEK'S STORIES:

Pieces of Amelia Earhart's Plane Located?

The Truth About Cats: They're Good for Us

Shift Happens: Mars May Have Plate Tectonics

Discovery News' Mars Coverage

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