Say you could view a time-lapse film of our planet: what would you see? Transparent images moving through light, “an infinite storm of beauty.”The beginning is swaddled in mists, blasted by random blinding flashes. Lava pours and cools; seas boil and flood. Clouds materialize and shift; now you can see the earth’s face through only random patches of clarity. The land shudders and splits, like pack ice rent by a widening lead. Mountains burst up, jutting and dull and soften before your eyes, clothed in forests like felt. The ice rolls up, grinding green land under water forever; the ice rolls back. Forests erupt and disappear like fairy rings. The ice rolls up-mountains are mowed into lakes, land rises wet from the sea like a surfacing whale- the ice rolls back.A blue-green streaks the highest ridges, a yellow-green spreads from the south like a wave up a strand. A red dye seems to leak from the north down the ridges and into the valleys, seeping south; a white follows the red, then yellow-green washes north, then red spreads again, then white, over and over, making patterns of color too swift and intricate to follow. Slow the film. You see dust storms, locusts, floods, in dizzying flash frames. Zero in on a well-watered shore and see smoke from fires drifting. Stone cities rise, spread, and then crumble, like patches of alpine blossoms that flourish for a day an inch above the permafrost, that iced earth no root can suck, and wither in a hour. New cities appear, and rivers sift silt onto their rooftops; more cities emerge and spread in lobes like lichen on rock. The great human figures of history, those intricate, spirited tissues that roamed the earth’s surface, are a wavering blur whose split second in the light was too brief an exposure to yield any images. The great herds of caribou pour into the valleys and trickle back, and pour, a brown fluid. Slow it down more, come closer still. A dot appears, like a flesh-flake. It swells like a balloon; it moves, circles, slows, and vanishes. This is your life.
Something else gets under your skin, keeps you working days and nights at the sacrifice of your sleeping and eating and attention to your family and friends, something beyond the love of puzzle solving. And that other force is the anticipation of understanding something about the world that no one has ever understood before you.Einstein wrote that when he first realized that gravity was equivalent to acceleration -- an idea that would underlie his new theory of gravity -- it was the "happiest thought of my life." On projects of far smaller weight, I have experienced that pleasure of discovering something new. It is an exquisite sensation, a feeling of power, a rush of the blood, a sense of living forever. To be the first vessel to hold this new thing.All of the scientists I've known have at least one more quality in common: they do what they do because they love it, and because they cannot imagine doing anything else. In a sense, this is the real reason a scientist does science. Because the scientist must. Such a compulsion is both blessing and burden. A blessing because the creative life, in any endeavor, is a gift filled with beauty and not given to everyone, a burden because the call is unrelenting and can drown out the rest of life.This mixed blessing and burden must be why the astrophysicist Chandrasekhar continued working until his mid-80's, why a visitor to Einstein's apartment in Bern found the young physicist rocking his infant with one hand while doing mathematical calculations with the other. This mixed blessing and burden must have been the "sweet hell" that Walt Whitman referred to when he realized at a young age that he was destined to be a poet. "Never more," he wrote, "shall I escape.