No, I'm not talking about the downtown crane!
Goce satellite, which maps the actual gravity on the planet. The earth isn't a sphere, but a bumpy potato shaped thing that's thick in some parts, thin in others, and the earth's crust varies between big and not as big depending where you dig.
I have a a new fitness idea? Want to lose a few pounds? Move to the south of India!
Sadly, if you want to lose mass, my fitness plan is not for you.
You can read more about the project here!