"Yes, but Leroy didn't, and I spent our first couple of hours trying to explain it to him. By the time he understood (if he does yet) we were past Cimmerium and over that Xanthus desert, and then we crossed the canal with the mud city and the barrel-shaped citizens and the place where Tweel had shot the dream-beast. And nothing would do for Pierre here but that we put down so he could practice his biology on the remains. So we did. "The thing was still there. No sign of decay; couldn't be, of course, without bacterial forms of life, and Leroy says that Mars is as sterile as an operating table." "_Comme le coeur d'une fileuse_," corrected the little biologist, who was beginning to regain a trace of his usual energy. "Like an old maid's heart!" "However," resumed Jarvis, "about a hundred of the little grey-green biopods had fastened onto the thing and were growing and branching. Leroy found a stick and knocked 'em off, and each branch broke away and became a biopod crawling around with the others. So he poked around at the creature, while I looked away from it; even dead, that rope-armed devil gave me the creeps. And then came the surprise; the thing was part plant!" "_C'est vrai!_" confirmed the biologist. "It's true!" "It was a big cousin of the biopods," continued Jarvis. "Leroy was quite excited; he figures that all Martian life is of that sort--neither plant nor animal. Life here never differentiated, he says; everything has both natures in it, even the barrel-creatures--even Tweel! I think he's right, especially when I recall how Tweel rested, sticking his beak in the ground and staying that way all night. I never saw him eat or drink, either; perhaps his beak was more in the nature of a root, and he got his nourishment that way." "Sounds nutty to me," observed Harrison. "Well," continued Jarvis, "we broke up a few of the other growths and they acted the same way--the pieces crawled around, only much slower than the biopods, and then stuck themselves in the ground. Then Leroy had to catch a sample of the walking grass, and we were ready to leave when a parade of the barrel-creatures rushed by with their push-carts. They hadn't forgotten me, either; they all drummed out, 'We are v-r-r-iends--ouch!' just as they had before. Leroy wanted to shoot one and cut it up, but I remembered the battle Tweel and I had had with them, and vetoed the idea. But he did hit on a possible explanation as to what they did with all the rubbish they gathered." "Made mud-pies, I guess," grunted the captain. "More or less," agreed Jarvis. "They use it for food, Leroy thinks. If they're part vegetable, you see, that's what they'd want--soil with organic remains in it to make it fertile. That's why they ground up sand and biopods and other growths all together. See?" "Dimly," countered Harrison. "How about the suicides?"