The reverence lasted the exact time of a heartbeat—and then the world called them back. Before Bhāskara could articulate any other word of gratitude or astonishment, the ancestral instinct of the Son of the Earth manifested itself. Tribal raised his face abruptly, his luminous eyes narrowing against the brightness as he sniffed the thermal air currents blowing directly from the south.
The corridor of damp rocks finally came to an end. The arid horizon, distorted by heat, began to unfurl before them, revealing, far in the distance, the ochre and monumental glow of colossal structures. They were the contours of the golden city of Suryashan. The final destination of a rhythmic and exhausting march that had consumed nearly a year of their lives. But the glory of that vision was immediately crushed by the position of the light.
Bhāskara raised his sweaty face to the firmament. The sun-king was high. Dangerously high. The inclement brightness punished the dry earth, and the sphere of fire advanced implacably toward the highest point of the celestial vault. The summer solstice was no longer a distant promise to be awaited. It was happening in that exact breath.
— The calculation! — bellowed the astronomer, the indomitable spark of reason igniting his gaze once more.
He turned to the guide, abandoning defeat and embracing the urgency of geometry.
— Alaya, what is the exact magnitude of your marks?
She did not need to recount the wooden shards in the satchel.
— Eight hundred thousand strides.
Bhāskara's brain operated at the speed of light. Eight hundred thousand strides. Eight hundred thousand absolute strides of soil devoured by human sweat.
His mind fitted the numbers into the proportion of the arc, and the answer exploded in his intellect.
— It's enough! — the astronomer's cry tore through the air of the gorge. — The distance closes the circle!
However, there was no margin for rhetorical celebrations. The Sun was approaching its absolute zenith over the golden city.
If the light passed that point before they could position the rod and verify the nonexistence of shadow, the shadow would grow again, erasing the irrefutable proof of the planetary calculation. The time window was closing. Bhāskara grabbed the torn parchments. Tribal tensed the tendons forged by mountains and plains. The measured march had ended. Without waiting for an order or exchanging another word, the two men and the woman ran desperately against the sky.
The wind tore through Bhāskara's lungs as he forced his exhausted muscles to the limit. The dust encrusted on his skin, the hunger accumulated over months of walking, the paralyzing despair of the Valley of Echo, and the mountain of feverish calculations... all were suddenly pulverized when the dark walls of the gorge ended abruptly. The acoustic labyrinth spat the travelers out onto a vast and incandescent plain. And then, tearing through the horizon line, it appeared. Suryashan.
The golden city. The Land where the Sun rests. It rose against the firmament not as a mere cluster of dwellings, but as a monumental delirium of divine proportions. Colossal towers pierced the clouds, capturing light in their domes of glass and crystal, while bridges of impossible architecture seemed to float without visible support over immense bronze canals. At the center of it all, the imposing Temple of the Sun pulsed, reflecting the implacable brightness of the solstice as if the heart of the empire were ablaze.
Bhāskara ran with tearful eyes, heaving breath, and a heart pounding against his ribs. For the astronomer, those shimmering walls represented the supreme altar of science, the exact geometric point where his theory would finally subjugate the cosmos.
He gazed at the immense gates with the reverence and urgency of one about to wrest a secret from the universe. Behind him, however, Tribal and Alaya exchanged a silent glance, charged with the crushing weight of the ages. The brilliant-minded astronomer had no idea what that horizon represented. He ran desperately toward the obelisks marked by solar symbols, completely ignoring that the immortal man running beside him had raised those same impossible wonders with his own hands.
Bhāskara marveled at the urban splendor, oblivious to the fact that he was dragging the serene woman back to the empire where she had once perfected medicine—the exact place where the two had lived under the absolute orders of the Lord of the Sun, Akasha.
— By the splendor of reason! — shouted Bhāskara, his voice faltering from exhaustion and dust, never losing the urgency of his steps. — The zenith awaits us!
Unknowing that he was penetrating the living ruins of his guides' millennial past, the astronomer crossed the immense gates and advanced like lightning through the stone avenues. And Suryashan swallowed him. The city was alive. Pulsing. Overflowing with people. But Bhāskara saw no one.
The wide, impeccable avenues were filled with figures in colorful garments—merchants, priests, children, elders, guards with polished bronze spears. Caravans of camels crossed the plazas. Merchants shouted offers in languages the astronomer did not register. The air smelled of incense, spices, and baked bread. And yet, for Bhāskara, all of it was a blurred landscape. A smudge. He did not see the faces. He did not hear the voices. He did not feel the curious gazes turning toward that strange trio—a thin, sun-scorched man, a serene woman with vast eyes, and a giant of telluric skin—who crossed the city at a run. There was only the zenith. The rod. The shadow that needed to disappear.
He slid across the impeccable pavements, dodging carts and passersby with the unconscious dexterity of a sleepwalker, and knelt abruptly in the center of a perfectly flat plaza. The plaza was full. Pilgrims, faithful, curious—dozens of people circulated around the great central gnomon, the ancestral monument that marked the geometric heart of Suryashan. But Bhāskara did not see them. With trembling hands and chest heaving violently after the exhaustion of the run, he drew the wooden rod from his bag—the portable gnomon—and positioned it in absolute perpendicularity against the light stone floor.
Tribal and Alaya halted their steps just behind, their breaths suspended. The Son of the Earth, the immortal who centuries earlier had built those same impossible wonders with his own technical mastery, merely watched the astronomer's obstinacy merge with the infallible precision of the cosmos. Around them, the crowd began to gather. Curious. Pointing. Whispering. But Bhāskara was deaf.
The sun-king reached the highest point of its trajectory. The light descended like a spear of fire directly upon the walls of the golden city. And then...
The shadow shrank. It retreated slowly to the base of the polished wood. And disappeared. Zero.
The zenith had been reached. The perfectly vertical rod cast not a thread of shadow upon the millennial stones of Suryashan. And, in that exact instant, the spell broke. The silence that settled over the sun-bathed plaza was denser than the sonic void of the Valley of Echo. No word was said. No dramatic pose was assumed. No theatrical speech was delivered.
Bhāskara slowly raised his eyes, brimming with physical exhaustion and genuine glory. And he saw. He saw the crowd. He saw the faces. He saw the wide eyes, the open mouths, the fingers pointing at him and at the shadowless rod. There were dozens of people around him. Perhaps hundreds. Pilgrims, priests, children in their mothers' arms, elders leaning on staffs, guards with hands on the hilts of their swords. All looked at him. All had seen.
The astronomer blinked, dazed, as if awakening from a long, feverish dream. He looked at Alaya. Then he turned his rustic face, dirty with desert dust, toward Tribal. The sage's dry, cracked lips broke into a mute, trembling smile. The experiment had worked. And the world—the real world, made of people and life—was there to witness it.
Alaya brought her hand to the small pouch and touched the marks carved into her pieces of wood. The guide's silent prudence confirmed the physical verdict of the inclement march. They had crossed precisely eight hundred thousand strides, limited by the tether of the constant rope. In the astronomer's feverish mind, abstraction swallowed matter completely.
If that monumental distance of null shadow corresponded to the proportion of 1/50 of the planetary arc measured at the great coastal escarpment months earlier... Mathematics made the result unquestionable.
Bhāskara mentally multiplied the strides traveled by the fifty parts of the angular proportion.
800,000 × 50 = 40,000,000 strides.
The circumference of the planet. The astronomer closed his eyes for an instant. They were not merely kneeling, exhausted. They held the circumference of the world in their calloused hands.
Three travelers, armed with wooden shards and counted steps under an implacable solstice, had just measured the entire planet. Before a crowd that did not understand what it had just witnessed. The monumental exhaustion finally exacted its price.
With absolute silence governing the plaza of Suryashan, the three travelers let themselves fall onto the light stone pavement. The moment of the zenith had passed. Slowly and inexorably, the Sun began to move away from the highest point of the sky, returning a thin trace of shadow to the base of the gnomon. The mechanics of the universe continued their irrepressible turn. But now, the mystery of its dimension had been unveiled.
Sitting with his back against a millennial pillar, Bhāskara breathed deeply. His theatrical pose had completely dissolved into the dust of the road. He lowered his eyes to his own leg, observing the worn rope that still united his ankles. Then he looked at the scraps of ruined parchment resting uselessly in his bag.
Finally, his gaze settled on Alaya's satchel, where the rustic pieces of carved wood guarded the secret of the globe. The astronomer swallowed the dryness in his throat.
— We built an instrument to measure the world — his voice came out low, hoarse, stripped of all arrogance. — We measured the shadow. We measured the angles. We counted the strides. We calculated the proportion. And in the end... we almost lost everything.
Tribal, with tendons finally relaxed and breath serene, turned his face toward Alaya.
The guide remained in absolute silence, her calm, vast eyes reflecting the golden light of the city. Being herself the living memory of creation, capable of comprehending the world at extraordinary speed, Alaya merely observed humanity stumble and rise with the inexhaustible patience of the ages.
Bhāskara let out a heavy sigh, crossing his calloused hands over his knees.
— Perhaps the greatest flaw of our mathematics was believing it needed to exist only on paper.
He gazed at the woman, finally understanding the hidden mechanism that saved the expedition. He had trusted absolutely in abstract numbers. Tribal had trusted entirely in the mechanical engineering of the rope and the stride. But Alaya, anchored in prudence, trusted in the fallibility of men. It was that silent virtue that wove the salvation of both.
Tribal sketched a light, ancestral smile. He followed Bhāskara's marveling gaze and concluded, breaking the quietude of the plaza with a deep voice:
— It wasn't.
The Son of the Earth looked at Alaya, reverencing the foundation without which infinity would never have been reached.
— It was in her.