"The things he showed me" – Professor Budlong exhaled cigarette smoke – "simply looked to me like very large seed pods, as they'd have looked to anyone, I'm sure. The farmer, Mr. Parnell, told me they'd come drifting down from the sky, which I didn't doubt – where else would they come from? – though Parnell seemed amazed. They didn't seem at all remarkable to me, except possibly for their size. Some sort of seed pod was all I could say, though I admitted that the substance they were filled with did not resemble what we ordinarily think of as seeds. Beekey tried to interest me in the fact that several objects in the trash pile on which the pods had fallen seemed very much alike, attributing this fact to the pods. He pointed out two empty Del Monte peach cans, I remember, which looked identical. There was a broken axe handle, and another similar one beside it. But I couldn't, myself, see anything very startling about that. Then he tried another tack; he wanted a story, you see, a sensational one, if possible, and was determined to get it."
Budlong drew on his cigarette, smiling at us. "Could these things have come, he now wanted to know, from 'outer space', as he phrased it. Well" – Budlong shrugged – "I could only answer yes, they could have; I simply didn't know where they'd come from. You see" – Professor Budlong sat up in his chair, and leaned forward toward us, forearms on his knees – "this is where young Beekey trapped me. The theory, the notion, whatever you want to call it, that some of our plant life drifted onto this planet from space, is hoary with age. It's a perfectly respectable, reputable theory, and there is nothing sensational or even startling about it. Lord Kelvin – you undoubtedly know this, Doctor – Lord Kelvin, one of the great scientists of modern times, was one of many adherents to this theory, or possibility. Perhaps no life at all began on this planet, he said, but it drifted here through the depths of space. Some spores, he pointed out, have enormous resistance to extremes of cold; and they may have been propelled into the earth's orbit by light pressure. Any student of the subject is familiar with the theory, and there are arguments for and against it.
"So, 'Yes', I said to the reporter; these could be spores from 'outer space'; why not? I simply didn't know. Well, this seemed astonishing news to my reporter friend, and he joined two of my words as a single phrase. 'Space spores', he said in a pleased tone, and wrote the phrase on a scrap of paper he was carrying, and I began to see headlines in the making."
Budlong sat back in his chair again. "I should have had better sense, but I'm human; it was fun being interviewed, and in my amusement I amplified the thought, for no other reason than to give young Beekey what he seemed to want." The professor quickly raised his hand. "Not, you understand, that I wasn't speaking the strict truth. It is perfectly possible for 'space spores', if you want to use so dramatic a term, to drift onto the surface of the earth. I think it's quite probable that they have, in fact, though I personally doubt that all life on this planet originated in this way. Advocates of the theory do point out, however, that our planet was once a seething mass of inconceivably hot gas. When finally it cooled to the point at which life was possible, where else could life have come from, they ask, than from outer space?
"In any case, I got carried away." The boyish-looking professor before us grinned. "It's a trait of the academic mind to amplify a theory at great and, quite often, boring length, and standing there on the Parnell farm, I gave the boy his story. Yes, these might be space spores, I said; and equally well, they might be nothing of the kind. In fact, I assured him, I felt quite certain they could be identified, if one were to take the trouble, as something, possibly rare, but perfectly well known, and originating right here on earth in the most commonplace way. The damage was done, however. He chose to print the first portion of my comments, omitting the second, and two or three rather flamboyant and, I felt, misleading newspaper stories, quoting me, appeared in the local paper, which I complained about. And that's the story, Doctor Bennell; much ado about nothing, I'm afraid."
I smiled, matching my mood to his. " 'Light pressure', you said, Professor Budlong. These pods might have been propelled through space by the pressure of light. That interests me."
"Well" – he smiled – "it interested young Beekey, too. And he had me; I'd given him part of the theory, I had to give him the rest. There's nothing mysterious about it, Doctor. Light is energy, as you know, and any object drifting in space, seed pods or anything else, would indisputably be pushed along by the force of light. Light has a very definite, measurable force; it even has weight. The sunlight lying on an acre of farm land weighs several tons, believe it or not. And if seed pods, for example, out in space, lay in the path of light that eventually reaches the earth – the light from distant stars, or any source at all – they would be propelled toward it by the stream of light steadily beating against them."
"Be pretty slow, though, wouldn't it?" I smiled at him.
He nodded. "Infinitely slow, so slow it would hardly be measurable. But what is infinite slowness in infinite time? Once you assume these spores may have drifted in from space, then it is equally true that they may have been out there for millions of years. Hundreds of millions of years; it simply doesn't matter. A corked bottle tossed into the ocean may circle the globe, given enough time. Expand the speck that is our globe into the immense distances of space, and it is still true that, given enough time, any of these distances may be crossed. So if these, or any spores, drifted to earth, they may well have begun their journey ages before there even was an earth."
He reached forward to tap me on the knee, smiling at Becky. "But you aren't a newspaper reporter, Doctor Bennell. The seed pods on the Parnell farm, if that is what they were, probably drifted there on the wind, from not too great a distance, and were undoubtedly a completely well-known and classified specimen with which I simply didn't happen to be familiar. And I'm sure I could have avoided a great deal of kidding from my colleagues at the school if I had simply said so to young Beekey. Instead of allowing him to take my theories and make me run with them." He grinned at us again, a very likable guy.
I sat thinking about what he said, and after a moment he said gently, "Why are you interested, Doctor Bennell?"
"Well – " I hesitated, wondering how much I could, or should, say to him. Then I said, "Have you heard anything, Professor Budlong, about a – sort of delusion that has been occurring here in Santa Mira?"
"Yes, a little." He looked at me wonderingly, then nodded at a mass of papers on the desk before him. "I've been working hard during this summer's vacation on what I feel, or hope, is a fairly important technical paper scheduled for fall publication; it will mean a great deal to me professionally. And I've been more or less out of circulation, working on it. But a psychology instructor at school did tell me something about an apparent, though temporary, delusion of personality change which several local people have had. You think there's some connection between that, and" – he grinned – "our 'space spores'?"
I glanced at my watch, and stood up; in just over three minutes, Jack Belicec was due to drive down this street, and I wanted us out at the tall hedge in front of the house, ready to step into his car. "Possibly," I answered Professor Budlong. "Tell me this: could these spores conceivably be some sort of weird alien organism with the ability to imitate, in fact, duplicate, a human body? Turn themselves, for all practical purposes, into a kind of human being, indistinguishable from the real thing?"