This website is no longer actively maintained
Some material and features may be unavailable

Erin Chapman


Video: Playing the field: Ethanol in Iowa

Need to Know correspondent Win Rosenfeld discovers how the presidential candidates are no longer committing to ethanol subsidies — a once-unthinkable position for a candidate seeking votes in Iowa.


Video: Polls and bears: Can markets predict elections better than pollsters?

Need to Know travels to Iowa to examine a unique futures market that may be better at predicting winning political candidates than traditional polling methods.


Video: Why you can’t handle the truth: the psychology of belief

Science journalist Chris Mooney explains how our pre-existing beliefs, far more than facts, color our conclusions about the world, from politics to religion.


Video: Twisted logic: What tornadoes don’t have to do with global warming

It’s been one of the deadliest tornado seasons on record. But meteorologist Harold Brooks of the National Severe Storms Laboratory warns: don’t blame it all on global warming.


Video: Cracking the code: Defending against the superweapons of the 21st century cyberwar

Need to Know delves into the story of Stuxnet, the sophisticated and devastating computer virus that may launch a 21st century global arms race.


The science of truth

Writing for Mother Jones, Chris Mooney examines the rationalization of self-delusion.


Climate observer mothballed

The world’s most advanced climate observer has been on ice for almost a decade. In a feature for Popular Science‘s April 2011 issue, writer Bill Donahue tracks down the earth-monitoring satellite DSCVR (Deep Space Climate Observatory) that was supposed to be launched back in 2001. He finds the $100 million device stowed in a Maryland […]


Interactive: Who would you kill? Test your moral intuitions

An out-of-control train is hurtling down the track toward four trapped hikers. What do you do? Test your moral intuitions in life-or-death situations with this interactive quiz.


Swallowing the whistle: Why we choose to do nothing when the stakes are high

Whether it’s a foul at the end of a basketball game or a an out-of-control train bearing down on four innocent people, human beings often choose to do nothing. Why? Sports Illustrated senior writer Jon Wertheim, author of “Scorecasting,” explains.