A group of British researchers has a hunch that once ancient humans learned to cook, starchy foods like root vegetables or grasses could have given them a calorie bump that fueled the evolution of the human brain. Scott Sherrill-Mix/Flickr hide caption

itoggle caption Scott Sherrill-Mix/Flickr

Bite into that bread before your main meal, and you'll spike your blood sugar and amp up your appetite. Waiting until the end of your dinner to nosh on bread can blunt those effects. iStockphoto hide caption

itoggle caption iStockphoto

There's new evidence reaffirming that eating foods with fat€” from avocados and salmon to dairy fat€” doesn't make us fat. eyecrave LLC/iStockphoto.com hide caption

itoggle caption eyecrave LLC/iStockphoto.com