1. Big Buy

In its largest acquisition to date, Facebook announced Wednesday it's acquiring mobile-messaging company WhatsApp for a whopping $19 billion. The move shows that Facebook is serious about becoming a mobile company--and will pay big money for startups that will help it achieve that goal.--Inc.

2. Interest Rates

For the first time in years, the Federal Reserve Board began debating increasing interest rates, according to newly acquired minutes of a January meeting. Watch out, small business owners: Higher borrowing costs are on the radar now.--Wall Street Journal

3. Need for Speed

If slow connection speeds are bringing your business down, you're in luck. Google has just announced it's expanding its Google Fiber network to 34 cities across the country.--TechCrunch

4. Health Update

A new study from Northwestern's Feinberg School of Medicine shows that older folks who sit too much are more likely to have disabilities--regardless of exercise habits. So your desk might not actually kill you, but there's still good reason to get up and out during the day (or at least get a standing desk).--USA Today

5. Oops

An employee of application-security company IncludeSecurity discovered that due to a security flaw, dating app Tinder hads been revealing users' exact locations for months. Tinder's CEO didn't fix the issue until months after he was alerted. It's yet another reminder to double down on mobile security, if you haven't already.--Fast Company 

6. Step Right Up

LinkedIn announced that its once-exclusive publishing platform--which was reserved for the likes of Richard Branson and Bill Gates--will soon be open to all of its users. Now you, too, can become a LinkedIn "influencer."--TechCrunch