About every 18 months someone in the popular press feels the need to point out "exciting new research" that shows that nature isn't really red in tooth and claw, but that evolutionary biology even seems to show that cooperation and even altruism can be adaptive! Except that's hardly news. Darwin himself pointed it out. It's nice that we keep confirming it and exploring its complexity, but could we just stop being so shocked by it? If nothing else, explain that the problem is that people have weird preconceived ideas about evolution, not that evolutionary theory keeps getting revised.