Imaginary dialogue between Wladimir Köppen and Alfred Wegener
by Charactorium · Alfred Wegener (1880 — 1930) · Sciences · 5 min read
It is in the cluttered map-filled study of the house in Graz that Wladimir Köppen comes to find his son-in-law Alfred Wegener, at the beginning of the year 1930. Outside, the Austrian winter whitens the rooftops; on the table, half-packed expedition trunks already await departure for Greenland. The old climatologist, who has guided Alfred since his early years and given him his daughter Else, blends here the pride of a mentor and the worry of a father. He has come to listen to him one last time before the ice.
—Alfred, take me back to that 1912 session before the Academy. What did you dare show that day to geologists who thought you were a meteorologist lost in their field?
Before those gentlemen, Wladimir, I laid out a map of the Atlantic and slid South America against Africa. The coastlines fitted together like two pieces of a torn newspaper whose lines of print we bring close. Then I showed the same plant and reptile fossils on both sides of the ocean — how to explain that they populate two shores separated by thousands of leagues of salt water? I argued that once these lands formed a single one, a Pangaea, later split and drifted apart. Faces hardened. A meteorologist coming to talk to them about their geology was already an insolence; for him to move their continents was madness. But the puzzle pieces did not lie.
—When you wrote to me as early as 1911 that all the continents were once one, I thought you reckless. What evidence convinced you yourself?
It was the fossils, above all, that robbed me of peace. Glossopteris, that ancient fern, is found identical in America, Africa, India, even Australia — and you know as well as I that a seed does not cross an ocean. I added the mountain ranges that continue from one continent to another, the glacial deposits unearthed in the tropics. None of these clues, taken alone, proves anything; but together they point to the same conclusion. That is what I wrote to you in 1911: it is not an argument, it is a bundle. When too many independent pieces of evidence converge on a single idea, it is chance that becomes the most unlikely hypothesis.
—You and I spent so many evenings on past climates. How do our paleoclimates support your drift?
Ah, our evenings on Die Klimate der geologischen Vorzeit! You taught me to read climate in rocks, and you gave me my strongest weapon. Consider: thick coal seams, born of tropical forests, are found as far north as icy Spitsbergen; and moraines of ancient glaciers lie in the heart of burning Africa. If the continents never moved, these climates are absurd, contradictory. But move the lands, bring them under other latitudes, and everything falls into order: coal forms at the equator, ice near the pole. The map of ancient climates becomes coherent only if we let the continents travel. Without you, Wladimir, I would never have known how to weave that proof.
—I have been told about that 1926 congress where your theory was compared to a flying hippopotamus. How did you take such mockery?
I will not hide that it hurt me. At that congress, men I respected laughed — one swore my drift was as impossible as a hippopotamus flying into the clouds. The complaint was always the same: I showed that continents move, but I could not say what force pushes them. To them, an unknown cause was proof of falsehood. I learned to take these blows without bending. A geologist from across the Atlantic reproached me for pleading like a lawyer gathering everything that serves his case. So be it. But what else can one do when facts pile up and people refuse even to look them in the face?
—What they reproach you for is the lack of an engine. What mechanism do you propose to move these continents?
That is my wound, I admit. I have proposed two possible engines: Polflucht, the flight of continental masses away from the poles, and tidal attraction slowly pulling lands westward. My calculations show these forces exist — are they strong enough? I am not certain, and my critics sense it. But remember, Wladimir: Galileo saw that the Earth turned without being able to say why, and he was right against everyone. The fact precedes its explanation. Prove to me one day that the force is wrong, I will seek a better one; prove to me that the continents do not move, only then will I fall silent. The motion, meanwhile, is written in stone.
Prove to me that the continents do not move, only then will I fall silent.
—Do you believe, Alfred, that in your lifetime you will see the geologists bow — or will it take a generation not yet born?
I harbor few illusions. Old masters do not recant; they die out, and the next generation changes its mind without even noticing. Perhaps I will not see that day. But the idea will not die with me: it is too firmly anchored to facts. Somewhere, a young geologist will one day measure the speed at which America is moving away from Europe, and everything will suddenly shift. Scientific truth does not need to be loved to prevail; it suffices that it be true and patient. I will have sown; others will reap. That is enough for me, as long as the field grows.
Scientific truth does not need to be loved to prevail.
—Let us talk about Greenland. What did you go looking for, expedition after expedition, on that ice sheet that already nearly claimed you?
Greenland is my great ice laboratory. I go there to measure the thickness of the ice cap, probe the air layers above the inland ice, record temperatures and pressures where no one has ever noted them. My barometer, my thermometer, my field notebooks never leave me; every number wrested from the cold is worth gold. These data feed everything: my meteorology, my atmospheric physics, even my drift, for the ice cap weighs on the bedrock and deforms it. The ice sheet nearly swallowed me, it is true. But it is the only place in the world where one touches the bare Earth, without the veil of forests or cities. One learns nothing about the poles from an armchair in Graz.
—These packed trunks worry me, you know. Why go back there again, at fifty, when Else and the girls are waiting for you here?
I know what these trunks cost you, and what they cost Else. Believe me, I weigh every danger. But I promised to set up the Eismitte station, in the very center of the inland ice, and men are already waiting for me there; I cannot abandon them to winter to stay warm. A scientist who sends others to face what he dares not brave himself is only half a scientist. I am fifty, so be it; but I still have the strength for one last crossing, and this one will close twenty years of questions. I promise you, Wladimir: this will be my last great journey on the ice. Upon my return, I will finally sit at your table to write, and I will leave the young ones to freeze in my place.
A scientist who sends others to face what he dares not brave himself is only half a scientist.
—That word you use, Pangaea — explain to me again what it contains, so that I may repeat it after you.
Pangaea — from the Greek pan, all, and gaia, earth: the All-Earth. That is the name I give to that single continent from which everything emerged. Imagine, some three hundred million years ago, a single landmass, encircled by a single ocean. Then, slowly, fractures cross it; the pieces drift apart like fragments of an ice sheet breaking up in a thaw. The Atlantic is nothing but the still-open tear between Africa and America, and it is still widening. Repeat it well after me: continents are not pillars planted for eternity, but rafts. Everything we tread upon has drifted, and drifts still beneath our feet, too slowly for any single life to feel it.
This imaginary interview was generated by artificial intelligence from sources documented in Alfred Wegener's profile. It dramatises what the figure might have said based on what we know about them, but does not constitute attested historical testimony. For primary sources and factual documentation, refer to the full profile.