Tracy has no funding for the experiment, just enthusiasm. He calls up colleagues and acquaintances and tells them what he’s fixing to do, and they jump on board with offers to help. Walt Mandeville, the university veterinarian, has volunteered to do the sedating. Tracy’s grad student Lee Lemenager will be manning the endoscope. Lee has the kind of face that children draw when they first begin to draw faces, everything round and benign. Earlier in the day when he dripped gastric acid on a superworm, it seemed like a friendly thing to do.
“And this is Frank and Terry, from OMED,” says Tracy as two more men show up in the lab. OMED of Nevada sells used medical equipment. “They lent us tens of thousands of dollars of video equipment that is forty years old and probably worthless. Welcome!” Tracy is one of those supremely likable professors whom students keep in touch with long after graduation. The back wall of the Tracy Laboratory is covered with photographic portraits he has taken of his grad students. His white hair suggests he may be closing in on retirement, but it is difficult to imagine him golfing or watching daytime television.
Tracy holds a bullfrog in sitting position while Lee feeds the scope into its mouth and down to the stomach. We aim to spy on a superworm swallowed less than two minutes ago. The endoscope, which is a flexible tube of fiber optics with a tiny camera and light at the end, is hooked up to a closed-circuit video monitor so that everyone can watch, and Tracy can film, what’s happening inside the stomach.
The frog is sedated but awake. It glows like a decorative table lamp, the kind that sets a mood but is not sufficient to read by. The screen on the monitor is solid pink: the view from inside a well-lit frog stomach. You don’t expect any part of a frog to be pink, but there it is, pink as Pepto-Bismol.
And then suddenly: brown. “There he is!” Lee focuses down on telltale bands of brown, tan, and black. The superworm is not moving. To see whether it’s even alive, Walt the veterinarian inserts a pair of biopsy forceps through the makeshift speculum that Lee slid down the frog’s esophagus at the beginning of the experiment. The jaws of the forceps gently squeeze the superworm’s midsection. It squirms, electing a spontaneous Broadway chorus: “It’s alive!”
“Is it chewing?” someone asks. As if by director’s cue, all heads lean in.
“That’s the tail,” says Walt the vet. Walt has a keen observational eye, honed by a span of years as a poultry inspector (“4.8 seconds per bird”).
Lee pulls back on the endoscope and works it over to the other end. The superworm’s mouthparts are still. Nothing is moving. Walt tells us about a phenomenon he calls the “blanket effect.” To calm a wild horse prior to treating it, a vet may herd the animal into a narrow chute lined with packing peanuts that gently presses in on its sides. It is the same principle behind swaddling an infant or hugging a distraught friend or dressing a thunder-phobic dog in an elasticized Thundershirt, available in pink, navy, and heather gray. Mercifully, stomach walls seem to act as a mealworm Thundershirt.
Before the superworm was presented to the frog, Lee looped a thread around its middle and secured it with surgical glue, so he could retrieve it later. Now that time has come. The frog surrenders its lunch seemingly without concern, and the superworm is left in a petri dish to recover. John Gray goes to get a chuckwalla, placing the superworm back behind the lizard’s teeth. Same result. The superworm quickly goes still but does not die.
One thing is clear from these experiments. Mealworms are not much troubled by gastric—that is, hydrochloric—acid. Many people, including myself when I began this book, think of hydrochloric acid more or less the way they think of sulfuric acid, the acid of batteries and drain cleaners and hateful men who wish to scar women’s faces. Sulfur likes to bind with proteins, radically altering their structure. If that structure is your skin, you come away from the experience disastrously altered. Hydrochloric acid isn’t as caustic.