1. Facebook is surging ahead on mobile revenue as well as mobile market share. Facebook now accounts for about one-fifth of all data used on mobile phones, and owns four out of the top ten apps in the Apple iOS store and Google Play. More over at Quartz.
2. Dark social is a term introduced by Alexis Madrigal two years ago to define the kinds of social sharing  (email, instant messaging, texting, etc.) that were not clearly attributed in analytics. Here he updates his hypothesis of dark social with the discovery that a good deal of this traffic is now trackable and attributable to Facebook sharing on mobile devices — which may be so prevalent now that it is eroding other ways of sharing.
3. Does the internet help you learn new things? 87% of Americans believe that it does. Also interesting: 72% say that the internet allows them to share their ideas and creations with others, a significant rise since 2006. This increase aligns with the mass adoption of social networking tools, and the ease of instantaneous publishing of text, images, and video through these platforms.
4. Whether you are paralyzed by choice in music discovery, or merely lazy enough to outsource all your listening habits to cooler friends, Spotify has got you covered. Try out “Top Tracks in Your Network” for a personalized, updated playlist based on what friends you follow are listening to.
5. Machine intelligence, defined here as what becomes possible as computers develop and scale abilities previously limited to humans, is poised to transform industries and create entirely new ones. Here’s a great chart of the landscape, and enumeration of relevant trends and opportunities.

Weekend fun: Deadspin may call my favorite team a “Godless Abomination,” but all basketball fans will enjoy Buckets, a quantitative approach to viewing shooting across all NBA teams and players.

Every Friday, find five, highly subjective pointers to compelling technologies, emerging trends, and interesting ideas that affect how we live and work digitally. Try out the Friday 5 archive, or sign up for a weekly email.