Elon Musk Reveals Tunnel, Facebook Hit With New Data Scandal and Crossword Secrets Revealed (60-Second Video) Here are three things entrepreneurs should know today.

• Elon Musk's Boring Company unveiled a new test tunnel yesterday in Hawthorne, Calif. The CEO took guests and reporters on rides on the "underground highway," which is meant to combat -- as he put it -- "soul-destroying traffic."
• A new investigation suggests that Facebook gave large tech companies like Spotify and Netflix exceptional access to users' personal data -- including the ability to view all of a user's Facebook friends and even read private messages.
• The editors of The New York Times crossword puzzle revealed their editing and evaluating process for puzzle submissions, including a few trends: They said Monday is usually easy, Thursday tends toward tricky themes and Friday and Saturday are the most difficult.

Watch the previous 3 Things to Know video: Nobody Silences Elon Musk and Apple's Squid Has a Butt on Its Forehead