0:00 A twenty-five-year-old cryptographic mystery was just solved, and the secret wasn't some hidden passphrase from a spy novel.0:09 It was a timestamp.0:10 This is one of those perfect reminders that the world is full of secret codes, and not always where you expect them — sometimes they’re in the plants on the sidewalk, like we saw with Margot Glass’s incredible homemade inks.0:27 But this one was hiding in plain sight, right at the heart of internet security.0:33 For decades, there have been these unexplained numbers — these "seeds" — baked into the standard encryption curves that basically everything online uses.0:45 The ones from the National Institute of Standards and Technology, or NIST.0:50 And because nobody knew where the numbers came from, the rumor mill went wild.0:56 Were they a secret backdoor?0:58 A clever message from the creators?1:01 People have been trying to crack this for a quarter of a century.1:06 And then, just the other day, a researcher going by Professor Claw figures it out.1:12 It wasn't a secret message.1:14 It was the output of a weak, old random number generator.1:18 The kind of thing you'd find on an ancient computer.1:22 And the key to the whole thing?1:25 The generator was seeded with… Unix timestamps.1:28 Just the date and time, down to the second, from back in the nineties.1:33 The grand conspiracy was just a lazy algorithm.1:37 Okay, but that’s just a secret becoming… mundane.1:41 Sometimes the secret is that the world is way more colorful than we thought.1:46 Astronomers at the University of Warwick just announced something that genuinely messes with your head.1:54 They found white dwarf stars that are… well, they aren't white.1:59 They found one that’s a ghostly GREEN.2:02 Others are pink, cyan, even purple.2:04 And this isn't some trick of the telescope.2:08 As one of the scientists, Doctor Mark Hollands, put it, these stars can produce colors nobody expected.2:15 So what's going on?2:17 You have to remember what a white dwarf is.2:20 It’s the super-dense core left over after a star like our sun dies.2:25 It’s supposed to be simple.2:27 Its color should just be based on its temperature, like a perfect piece of hot metal.2:33 White hot, blue hot, whatever.2:36 But their atmospheres are so dense, and have such intense gravity, that they can hold onto unusual elements.2:44 And in the case of this green star, its atmosphere is full of sodium.2:49 That sodium acts like a filter.2:51 It absorbs light in the yellow and red parts of the spectrum, so what’s left to reach our eyes?2:58 Green.2:59 It’s the same principle as a stained-glass window, but it’s happening on a STAR.3:05 It’s like we’ve been looking at the universe in black and white and someone just flipped a switch.3:12 The basic rules we thought we knew suddenly have these wild, beautiful exceptions.3:19 And that brings me to the discovery that I just can't stop thinking about.3:24 It’s from a few years back, but it has that same "wait, what?" quality.3:29 It’s about salamanders.3:31 Specifically, spotted salamander embryos.3:34 For over a century, we’ve known that a certain species of green algae, Oophila amblystomatis, lives in the egg sacs with the embryos.3:44 It seemed like a classic symbiotic relationship.3:48 The algae get a safe place to live and feed on the embryo’s waste.3:53 In return, they pump out oxygen and sugars for the developing salamander.3:58 A nice, clean transaction.4:00 Neighbors helping neighbors.4:02 Except that’s not the whole story.4:05 In two thousand eleven, a team of scientists decided to look closer.4:10 Waaay closer.4:11 Using special imaging that makes chlorophyll glow, they found the algae weren't just floating around the embryo.4:20 The algae were INSIDE the salamander’s own cells.4:23 Not just in the egg, but inside the body of the animal itself.4:28 This had never been seen before in any vertebrate.4:32 It completely changes the picture.4:34 This isn't a friendship; it's a merger.4:37 The algae are living inside the salamander’s house, inside its rooms, using its plumbing and paying rent in sugar.4:46 This is where the pattern clicks into place for me.4:50 The crypto mystery, the colorful stars, the salamander cells.4:54 In every case, we had a label for something.4:57 An encryption standard.4:59 A white dwarf.5:00 A symbiotic relationship.5:02 And in every case, the label was making us blind.5:06 It made the story smaller than the reality.5:09 The truth wasn't a conspiracy, but it was a weak algorithm.5:13 The star wasn't just white, it was a prism.5:17 And the algae weren't just neighbors, they were part of the family.5:22 It proves that the most amazing discoveries are just waiting for someone to ignore the label and simply look closer.
