Small children can be particularly vulnerable when natural disasters strike. They may be unable to understand what turned their lives and those of their families upside down. They may be confused, angry, fearful or saddened -- and that may manifest itself in behavior such as bed-wetting, sleep problems and separation anxiety, according to the Federal Emergency Management Agency.

MED-Math-Pain

You're at a big group dinner and it's time to pay up, to divide the total and multiply a certain percentage for the tip. How many people tense up and say something like, "Oh, I'm so bad at math"? Fear of math is everywhere - in the adult world where there aren't official pop quizzes, and in schools where the next generation of scientific problem-solvers are struggling with homework. Researchers report in a new study in the journal PLoS One that this anxiety about mathematics triggers the same brain activity that's linked with the physical sensation of pain.

TECH

TECH-Twitter-FDNY (with art)

As Hurricane Sandy swept through New York City and emergency crews scrambled to rescue victims, Emily Rahimi was responding to cries for help and offering words of comfort -- all in 140 characters or less.

TECH-Sandy-Facebook-Chatter

Superstorm Sandy has been the year's second most-talked-about topic on Facebook, after the Super Bowl, according to data provided to CNN by the social network.

TECH-Games-Mobile-Phones-Africa

Move over Japan. Move over Silicon Valley. Africans are making a bid to turn the continent into the new home of mobile gaming.

TECH-Computers-Humans-Science

Computers are evolving. We have voice-controlled assistants on our phones, telepresence robots for when we can't make it to a meeting in person, and self-driving cars that are headed to a road near you. These machines aren't just taking over human tasks. Computerized systems are also taking on more human characteristics. As technology gets more advanced, how will our relationships with it change?

TRAVEL

TRAVEL-Tanzania-Guide

Home to Africa's highest mountain and one of its most famous wildlife parks, Serengeti, Tanzania is one of the continent's most popular tourist destinations.

TRAVEL-Facing-Fears-Travel

We don't mean to scare you... No wait, actually we do, but only for a little while, and we promise the payoff will be worth the effort. These spots offer spectacular sights and experiences to travelers who are willing to face down five common, and very real, fears.

TRAVEL-Bury-Head-in-Sand-Trips

Blaring ads, arguments with co-workers, family and (former) Facebook friends. The cold nip in the air is already driving you over the edge, but presidential elections really make you want to bury your head in the sand. No need to flee the country without voting. The State Department and the Federal Voting Assistance Program offer guidance for U.S. citizens. But if you don't want to hear any more about it after that, a warm weather getaway might be just the ticket. If the elections don't go your way, hold onto this list. These places are great ex-pat havens.

TRAVEL-Post-Sandy-Travelers