London's gruesome attack and the rising threat of lone-wolf terrorism
How a Ghost Army of American artists helped defeat Hitler
WATCH: Stewart and O'Reilly spar over scandals
Let's kill off more main characters in movies
What happens when 2 ancient galaxies smash into each other?
Immigrant entrepreneurs wanted: Rust belt cities need you
Did IRS official Lois Lerner waive her right to silence?
4 drone questions Obama should answer
The FBI kills Tsarnaev's friend
10 things you need to know today
Can Christie win the GOP nomination?
7 annoying teenage sounds
Is Greek yogurt hurting the environment?
WATCH: London terror suspect defends beheading
The daily gossip: Paris Hilton is releasing another album, and more
LATEST: Weiner: Bad for dogs
The phenomenon of grieving dogs: The ultimate loyalty [Updated]
Dog panties, dog pedometers, and 7 more unnecessary pet accessories [Updated]
Devocalization: The controversial act of removing dogs' vocal chords
Does looking at pictures of puppies improve concentration?
America's first pet-obesity clinic: A guide
8 ways dogs improve your health
Are babies who live with dogs healthier?