Summer sale: Save 58%

Melanie Silvis

(<a href='http://www.istockphoto.com/portfolio/LynnSeeden'>LynnSeeden</a> via <a href='http://www.istockphoto.com/'>iStock</a>)

Refrigeration slows — but doesn’t stop — food rot. Now scientists know why

Melanie Silvis
(Associated Press)

How gut bacteria manipulates your immune system — by mimicking it

Melanie Silvis