Uh-oh. The creationist expectation of an abrupt transformation from one species to another has been demonstrated: the picture below is of a chicken egg that was cracked open to make a meal, and inside … a dead gecko. A bird giving birth to a reptile?
Actually, no, sorry. A chicken giving birth to a lizard is the kind of thing creationists imagine that evolution predicts, but which would actually surprise and disturb scientists if it happened — we’d have to rethink a lot of genetics if a solid instance were documented.
In this case, there’s an alternative, if rather disgusting, explanation. The poor mother hen had a gecko crawl up her cloaca (probably in a pushy attempt to sell her insurance), die somewhere in the oviducts, and then got incorporated into the egg before the shell was laid down. The deposition of a calcium-containing shell is one of the last steps in egg production, so it’s possible…it would just take a very persistent suicidal gecko, or one that was profoundly lost.
Don’t tell Geoffrey Simmons — he’s been on a credulity junket lately, crowing about every functional adaptation, including the egg, as proof of purposeful design. I don’t know about you, but a system that muddles excretion with reproduction and that allows random lizards to crawl up your butt and squat in your oviduct doesn’t sound like great engineering to me.