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
How Apple's tricky accounting could spark global tax reform
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
LATEST: Yahoo's Marissa Mayer: The debate over her brief maternity leave
Teenage 'roid rage
'Mexican Barbie' and 10 other controversial Barbies [Updated]
The Oregon dad who used his scantily clad daughter to sell his Datsun
The viral email from the most disappointed father on earth
Should a 7-year-old cancer patient be treated with medical marijuana?
Is it safe for teens to guzzle protein shakes?
Coming soon: Making babies... without sperm?