Древние люди 66 кофе 30 кадров в секунду

How Did Humans Learn to Drink a Plant's Defence? Think of the last bitter thing you put in your mouth on purpose. Coffee, probably. Dark chocolate. Strong tea. Now the part nobody mentions. Your tongue carries about twenty five separate detectors whose entire job is bitterness. One for sweet. One for savoury. Twenty five for bitter. That is not a flavour system. It is a warning system, and bitter means stop. This video is not the story of how coffee was found. It is about what the warning was pointing at, and what happened to it. Inside: Why a poison alarm gets twenty five detectors and sweetness gets one Caffeine as a pesticide: what it does to the insects that chew the leaf, and to the seedlings that grow too close Six unrelated plants on four continents that each arrived at the same molecule, and the genome work showing they built it out of different parts Why the molecule sits in the seed and the growing tip, and why that is exactly what we ended up drinking The bees that get a low dose in the nectar and remember the flower better, while the same plant poisons its pests with the same molecule What tiredness actually is, and why caffeine adds nothing at all Seven links, from a chewed leaf to a drink with the plant left out The arithmetic you can run on yourself in ten seconds An honest section on what I have tidied up and what I cannot separate The alarm still fires. Every single morning. You simply learned to hear it as a flavour. Chapters below. 0:00 Twenty five alarms for one taste 1:03 What bitterness is for 2:00 Not everyone gets the same set 3:04 What the alarm was pointing at 3:54 More than a hundred plants make it 4:25 Where in the plant it sits 5:14 Invented more than once 5:41 The genome that showed it 6:21 And then one animal went looking 7:00 The mistake the plant made 7:51 What tiredness actually is 9:00 A hand over the gauge 10:44 So, what ended it? 11:47 The last links 12:18 The price, in arithmetic 13:39 The alarm used to set the dose 14:20 The scale 14:53 Back to the bees 15:28 The plant has a dose, you have a preference 15:53 The honest part 17:14 What if 18:13 Back to the cup 19:02 One ordinary day