With 30 million unique visitors and close to 2 billion page views a month, it's safe to say a lot happens on the link-sharing and discussion site Reddit every day. There are more than90,000 sections on the site; a single discussion alone can sometimes attract more than 10,000 comments.

How can anyone keep track of it all? Our daily Reddit Digest highlights the most interesting or important discussions from around the site—every morning.

  • New Mexico’s Dr. Michael Hamm, a physicist, neuroscientist, and anti-SOPA essayist, did an AMA in conjunction with the announcement of his run for Congress, as did Sean Closson, a 25-year-old artist also from New Mexico. (r/IAmA)

  • Today I Learned has a stunningly cool way to do multiplication. (r/TodayILearned)

  • Try your hand at the test Thomas Edison designed for prospective National Park Service employees. (r/TrueReddit)

  • The day after the SOPA-inspired blackout, r/AskReddit addresses what to do when the tables are turned: A local business used a redditors’ friend’s art without compensation or permission. (r/AskReddit)