Our picks for the week of July 25-31: 

• First we picked 40 chefs worth keeping an eye on across the nation. Now it's your turn. Here are our readers' favorite 40 chefs under 40.

• It's been a steamy summer. Here are six classic summer drinks to keep you cool.

• Science usually sorts out truth from fiction, but here are 15 hoaxes that almost fooled everyone

• Ken Edelstein makes a historical comparison that may raise your blood pressure. He writes that climate change evokes the battle over slavery. Find out why.

• In Britain, Big Brother is looking at kids' bagged lunches.

"Happy-Go-Local": Author Linsly Donnelly shares her tips for taking care of her family and the planet — while maintaining your sanity.

• Auto X Prize finalist promises to build the VW of the 21st century.

• Fallujah's toxic legacy: The shocking rates of infant mortality and cancer in this Iraqi city raise new questions about chemicals used in battle.

Green designer Gretchen Jones will be part of this season's "Project Runway" cast.

• And finally, don't miss this gallery of 10 terrifying twisters.

Plus: Don't miss the week in photos, which includes the gorgeous image of a lavender field at sunset (above.)