This Nov. 19 screenshot shows the cover photo of an unofficial Marine group on Facebook called Just the Tip, of the Spear. The group and those like it have been accused of promoting sexism and of acting as a forum for hate speech. Just the Tip, of the Spear - 21/Facebook hide caption

itoggle caption Just the Tip, of the Spear - 21/Facebook

Photos from Liz Paul's blog entries on Prior Fat Girl. The blog chronicles women's weight loss journeys. Courtesy of Liz Paul/PriorFatGirl.com hide caption

itoggle caption Courtesy of Liz Paul/PriorFatGirl.com

Dana Bolger, who says she was raped in 2011 while a student at Amherst College, co-founded a group that seeks to educate students about their rights under Title IX. Jennifer Ludden/NPR hide caption

itoggle caption Jennifer Ludden/NPR

An Aymara woman prepares to take part in a pageant in La Paz, Bolivia, in 2013. Jaqi-Aru, a community of volunteers is working on translating the Facebook interface in the indigenous language of Aymara. Juan Karita/AP hide caption

itoggle caption Juan Karita/AP

Our readers wrote in on how they tried to take a vacation from their smartphones. Christian Wheatley/iStockphoto hide caption

itoggle caption Christian Wheatley/iStockphoto

High school students whose friends posted photos of drinking and smoking were about 20 percent more likely to become drinkers or smokers themselves. iStockphoto hide caption

itoggle caption iStockphoto