A blue whale is seen in Timor waters in an undated photo. The marine mammal buttresses Cope's rule, the notion that over the course of evolution, most animals tend to get bigger. Kiki Dethmers/AP hide caption

itoggle caption Kiki Dethmers/AP

"Flavor is the most important ingredient at the core of what we are. It created us," John McQuaid writes in his book Tasty: The Art and Science of What We Eat. Getty Images hide caption

itoggle caption Getty Images

Researchers raised two groups of walking, air-breathing Polypterus senegalus — one on land and one on the water. They discovered that each group was able to adapt to be best suited to its environment. A. Morin, E.M. Standen, T.Y. Du, H. Larsson/McGill University hide caption

itoggle caption A. Morin, E.M. Standen, T.Y. Du, H. Larsson/McGill University

"Better Together" will illustrate a story about bird personalities and cooperation when the book Great Adaptations is published in the fall. James Munro/Courtesy of Breadpig, Inc. hide caption

itoggle caption James Munro/Courtesy of Breadpig, Inc.

Bill Nye (left) and Ken Ham debated whether creation is a viable model of origins in the modern scientific era during a lengthy debate Tuesday. The points they raised have fueled an online conversation that continues. YouTube hide caption

itoggle caption YouTube

Bill Nye, left, and Ken Ham will debate the issue Tuesday at 7 p.m. ET. AnsweringGenesis.org hide caption

itoggle caption AnsweringGenesis.org

Kansas Board of Education members look over language for a science textbook in 2007. The fight over the teaching of evolution has been particularly fierce in Texas, which because of its size influences many textbook publishers. Charlie Riedel/AP hide caption

itoggle caption Charlie Riedel/AP