Alan Davies and Marcus du Sautoy visit the UK's National Physical Laboratory, where Mark Oxborrow takes them through an experiment that demonstrates how prime numbers exist in nature, and the Riemann hypothesis.
Microbiologist Professor Mark Turner breaks down the science behind pickling, the role of hurdle technology when preserving food and how the addition of acids, salts and sugars protect your pickles by increasing the hydrogen ions and making it difficult for microorganisms to grow. Whether you love the strong flavour of pickles or not, acids play an essential role in keeping your pickles bacteria free.
Professor Melissa Fitzgerald explains why starch thickens food, what time it is naturally produced in a plant and why that gives it such unique properties. From the onion-like semi-crystalline structure to its partial solubility, starch can undergo both glass transition and gelatinisation, making it a very interesting polymeric carbohydrate.
Ben Milbourne and Joel Gilmore use osmosis to cook up the perfect sautéed mushrooms, and Dr Arndrew Stephenson explains what exactly is happening when you use salt to accelerate the process. Osmosis is the transferal of liquids through a semi-permeable membrane. By adding salt, the water trapped within the mushroom's cell walls is drawn through the skin, or membrane, and into the pan as the two concentrations attempt to find a balance.
Stanley is sent out on his first day of work at Camp Green Lake. Interwoven flashbacks reveal the origin of the Yelnats family curse and his great-great grandfather's broken promise to a fortune teller.
Bonita and Koiki's son accidentally ingests some kerosene and they must take him to the town hospital. After their son is released, the young family must find somewhere to sleep for the night, awaiting the morning train. All the hotels refuse to let the young indigenous family hire a room. After work the next day, Eddie takes a small stand against the endemic racism Indigenous people face.
Diggity accidentally ingests poison and begins to die. Robyn makes a difficult decision to put Diggity out of her pain. The loss of her companion sends Robyn into a spiral, and she struggles to continue. Fearing for Robyn's safety, Rick accidentally gives way her location and a troop of journalists descends upon her camp. That evening, Rick asks after Diggity and the next day Robyn breakdown, heartbroken and seeking companionship.
The young woman falls in front of Winston, who helps her stand again. In his cubicle, Winston retrieves the notes she slipped into his sleeve. At home, Winston contemplates who she is. While fixing a water pipe for his neighbour, the son accuses Winston of being a thought criminal. At Victory Square, the young woman appears behind Winston and they covertly discuss their next meeting.
O'Brien questions Winston about his memory, his crimes and his sense of wrongdoing, while also subjecting him to painful torture. O'Brien instructs Winston to use discipline to control his mind, and come to terms with the logic of doublethink and the principles of the Party.
Robyn sets out to find and tame her own camels. Seeking the help of a camel wrangler Sallay Mahomet, Robyn is offered work and a single camel. After a month, Sallay gives Robyn her first camel. Later, Robyn's friends visit for a night. While there, Rick Smolan offers to help Robyn sell her story, which she politely refuses. During the party, Robyn takes space outside. Before leaving, Robyn's friend gives her a tape with a reminder of her mother. Rick, the photographer, also leaves a tip, should
Edward reveals he knew they were breaking into Jim's house, and why he went along with the plan.Kim is upset they let Edward take the blame and fights with Jim about telling the truth. Edward trashes the bathroom in a fit of anger. Over dinner that evening, Bill Boggs asks Edward a hypothetical question regarding the ethical response to a situation. Edward's answer is kind but legally incorrect. The scene raises questions about individual accountability and behavioural ethics.
Critique the "sense and nonsense" of the global $100 billion vitamin and supplement industry with Derek Muller in Vitamania. Then test your knowledge of importance of vitamins in our diets and the history of the business.