0:00 Marie and Pierre Curie processed eight tons of pitchblende waste to produce one-tenth of a gram of pure radium.0:10 That single speck of matter would rewrite the laws of physics, but the cost of its discovery was written in their very bones.0:22 I recently acquired a first edition of Pierre Curie's collected works.0:29 Tucked inside, between pages on crystallography, was a single folded sheet of paper.0:37 The handwriting is small, precise, slightly faded.0:42 The date at the top reads April twentieth, nineteen-oh-two.0:48 I think… I think this is a lost diary entry.0:52 From Marie Curie.0:53 On the day they finally succeeded.0:57 It reads: April 20, 1902.0:59 Four years.1:00 One-thousand four-hundred and sixty days in this leaky shed we call a laboratory.1:08 My back aches from stirring the cauldrons.1:12 My hands are chapped, burned.1:15 Some nights, I wake up coughing from the fumes.1:19 Pierre worries, but he coughs too.1:23 We are bound together in this exhaustion.1:27 This magnificent exhaustion.1:29 For forty-five months, we have boiled and filtered and crystallized.1:36 We have moved tons of earth and residue with our own hands, searching for something no one had ever proven existed.1:47 The university refused us a proper lab.1:51 The funding was our own.1:53 The belief… was our own.1:55 But tonight.1:56 Tonight, it is finished.1:59 After the final fractional crystallization, in the dark of our shed, we saw it.2:06 In a small porcelain dish… a substance that glowed.2:11 A faint, blue-green, spectral light.2:15 It is our own private constellation.2:18 One decigram of pure radium chloride.2:22 It is warm to the touch.2:24 It is alive.2:25 Pierre took my hand.2:27 We did not speak.2:29 There were no words for this.2:32 We have stared into the heart of matter, and it has stared back.2:38 This light was not created by us.2:41 It was simply… revealed.2:43 A secret kept by the universe, now resting in a dish on our workbench.2:50 I do not know what this power will be used for.2:54 I only know the pursuit itself was the purpose.2:59 The work was the prayer.3:01 The work was the prayer.3:04 She couldn't have known that this faint glow would power new therapies for cancer.3:12 That it would lead to the atomic bomb.3:15 That the very substance that marked her triumph was also slowly poisoning her.3:23 She saw only the light, the purity of the discovery.3:28 All the sacrifice, the pain, the four years in a cold shed… it all collapsed into a single point of light on an April night.3:40 The cost of a new world, written on a single, forgotten page.