The $2.5 billion that it cost to launch Curiosity Rover may sounds like a lot, but as the Facebook group "I f**king love science" noted, that's pocket change compared to the cost of the London Olympics ... The group compared Curiosity's $2.5 billion number from The New York Times and the Olympic's $15 billion estimate from Forbes in a pie chart, which has also been floating around Tumblr. We liked the way they thought but decided to put the numbers in a bar graph instead. (A pie chart suggests Curiosity and the Olympics were dipping from the same pool of money.)