It's a dog eat dog world out there, as any Darwinist will tell you. Except we don't have to worry much about dogs, other than the occasional pit bull. Still, there are plenty of creatures out to get us, most of them invisibly small. If a pit bull attacks, we must consciously muster a defense. But when viruses and bacteria come to call, our body's defenses kick in on their own, without conscious control. See this week's Musing.
Anne's Sunday cyberpic. Click to enlarge.