Her: Curiosity on Mars

You may or may not know that the new rover Curiosity presently boldly rumbling over the surface of Mars has a twitter feed.

Curiosity Rover @MarsCuriosity

Going the Distance (not necessarily going for speed). Over the last three sols, I've driven 226 feet (about 69 meters) #MSL

I can't really think of any scientific entity or advance that has been given a personality (or, in fact, a gender) before, and it certainly seems to be compelling. This BBC video meets the team behind the tweets, although you may not want to ruin the magic.