Cathy: I WAS SHOCKED WHEN MY DOCTOR TESTED ME FOR IMMUNITY TO MEASLES AND I'M NOT IMMUNE AND I THOUGHT, WAIT A MINUTE, I WAS VACCINATED WHEN I WAS A KID. SO IS THIS AN ISSUE THAT YOU NEED TO WATCH ...

If you're enjoying this article ... chances of hitting us keep changing so rapidly—check out our February 12 episode. [CLIP: Sound transition] And speaking of space: new observations from ...