For this week's Mashable Photo Challenge, bring out your dark side. Explore the outdoors after sunset, look for shadows on dark pavement and entertain your superstitions

Your submissions can be Halloween-related — orange and black, spirits and haunted things — but they certainly don't have to be. You're free to experiment with shadows, still life, and low light settings in basements and warehouses. Take advantage of late dusk and early dawn. We want to see a variety of raw images, heavily edited shots and even film photographs with vintage effects. Read more...

More about Photography, Halloween, Social Media, Apps Software, and Mashable Photo Challenge Guest Series

At 6:52 p.m. Eastern on Oct. 28, Facebook went down. (It began working again at 7:27 p.m.) This is the third such outage in the last several months, and it happens to coincide with the company's announcement of impressive summer earnings.

The close proximity of outage and earnings makes some uncomfortable math possible.

In the third quarter, Facebook posted revenue of $3.2 billion. The third quarter lasts 91 days, from July 1 to Sept. 30. This amounts to:

  • $35,164,835 per day

  • $1,465,201 per hour

  • $24,420 per minute

If we consider "revenue per minute" as a benchmark for potential losses, Facebook took a bit of a hit this evening. Their last outage, back in August, lasted for 19 minutes and lost them $426,607 (based on second-quarter revenue.) Using the same hypothetical math, this outage cost them a bit more — their third quarter was much more profitable, after all. Though it was down for just 35 minutes, Facebook lost $732,600 in revenue. Read more...

More about Facebook and Social Media
A couple of months ago one of the guest speakers in my NYU class presented a slide during her talk with a list of 5 SEOs to follow on Twitter. I couldn’t believe how much interest this one slide generated – all the students got on high alert and started jotting down names or taking pictures of the slides with their cell phones. Same thing happens every time I speak at a conference.The Power of Curated ListsI think most of the marketers underestimate the power of curated lists, and how much users actually love them. Brands want to tell stories and they want the content to be about them. They stay away from lists, so it’s a land-grab for smart, creative entrepreneurs.The businesses that understand the power of ‘listicles,’ such as Mashable, thrive and grow at rates unheard of in corporate America. Moz 10 Top leads the way on the SEO scene, for example. Successful business models were built by companies such as Thrilist or AppSumo that put 99% of their marketing efforts on lead generation and newsletter marketing. Look up the three companies I mentioned here if you don’t already know them to learn more.Ok, now it’s my turn. A week ago I published my new Kindle book, 99 SEO Tools for 99 Cents, and I thought it would be a cool book marketing strategy to include a bonus chapter with a resource of the top 20 SEO folks to follow on Twitter. The book landed on the Amazon bestseller list in “search engine optimization” category, and I already got some good feedback on the value the list provided.20 SEO Influencers to Follow on TwitterHere is a totally subjective list of the top SEOs to follow on Twitter (in no particular order). This is not an SEO seniority list or yet another popularity contest for link building. If you follow the SEO folks listed below, you are in a good company.Below I shared (almost) all the names included in my 99 SEO Tools for 99 Cents. All but ONE. What’s the name of the most influential SEO sumo on the planet? Who is she/he? Drop a note in the comments section if you have any ideas. It’s an easy guess… I hope. @M______ ? ???????????@RandFish ? Rand Fishkin, Moz@iPullRank ? Mike King, iPullRank@DannySullivan ? Danny Sullivan, Search Engine Land & SMX@JennyHalasz ? Jenny Halasz, JLH Marketing@DuaneForrester ? Duane Forrester, Bing@Fighto ? Paul Shapiro, Catalyst@Backlinko ? Brian Dean, Backlinko@DanCristo ? Dan Cristo, Triberr@Rhea ? Rhea Drysdale, Outspoken Media@Emcgillivray ? Erica Mcgillivray, Moz@Dr_Pete ? Dr. Pete Myers, Moz@StoneTample ? Eric Enge, Stone Temple Consulting@SankarPonnusamy ? Sankar Ponnusamy, Priceline@SyrusShepard ? Cyrus Shepard, Moz@Sonray ? Jason White, DragonSearch@MarkTraphagen ? Mark Traphagen, Stone Temple@GregBoser ? Greg Boser, Foundation Digital@BrentCarnduff ? Brent Carnduff, Echelon SEO@Btabke ? Brett Tabke, Pubcon & Webmaster WorldIf you think there are important names that are missing from the list, send me suggestions on Twitter at @SearchDecoder or drop a note in the comments section.photo credit: szeke via photopin cc