Why Are My Facebook Friends Changing Their Profile Pictures to a Giraffe?
Perhaps some (or a lot!) of your Facebook Friends have changed their profile pictures to a giraffe. Maybe you have too? Welcome to 'The Great Giraffe Challenge'.
How did it start? We've traced it back to New Zealander Andrew Strugnell who apparently started The Great Giraffe Challenge.
See if you can figure it out, before I give you the answer!