Starts with an R, ends with an F. And it ain't RALPH! #roundoff

Can you prove the square root of 2? The last guy that tried got assassinated! #goodluck #beready

Do you feature the IASC program? Space Initiatives

Do you want to be a teacher? Good I'm here to change that.... #judgementday #fearme

Scientists using @NASAKepler data have found the first Earth-sized rocky planet! Good stuff! go.nasa.gov/HsE7EO