Our good friends at Google run a daily puzzle challenge and asked us to help get them out to the geeky masses. Each day’s puzzle will task your googling skills a little more, leading you to Google mastery. Each morning at 12:01 a.m. Eastern time you’ll see a new puzzle, and the previous day’s answer (in invisitext) posted here.

SPOILER WARNING:
As a test, we’re going to leave the comments on so people can work together to find the answer. As such, if you want to figure it out all by yourself, DON’T READ THE COMMENTS!

Also, with the knowledge that because others may publish their answers before you do, if you want to be able to search for information without accidentally seeing the answer somewhere, you can use the Google-a-Day site’s search tool, which will automatically filter out published answers, to give you a spoiler-free experience.

And now, without further ado, we give you…

TODAY’S PUZZLE:

You may have seen enough detective shows to know which blood cells are used for DNA analysis, but do you know which system they belong to?

YESTERDAY’S ANSWER (mouseover to see):

To find the difference between a composer and a songwriter, check the definitions of each word. You might compare [define:composer] to [define:songwriter] to find that a songwriter writes lyrics, while a composer primarily writes music.