When you discuss a topic and everyone agrees, the conversation often falls silent quickly. However, if you disagree, you contradict what has been said, and the discussion continues. Paul Graham, a computer engineer, therefore proposed a "hierarchy of disagreements" in 2008. Figure out at what level
Pi is the ratio of a circle’s circumference to its diameter. And it doesn’t matter how big or small the circle is, the ratio always stays the same: pi. That’s why pi is called a constant. Authors: ZDF/Terra X/Bilderfest/Lena Paul/Dirk Hagen/Saba Bussmann/Jochen Schmidt Translation and dubbing: alu
Atoms and molecules are always in motion. Temperature reflects how intensely they move. The faster they move, the hotter it gets, and vice versa, right down to absolute zero, where everything stops. To define temperature, there are different scales. Authors: ZDF/TerraX plus/Bilderfest/Paul Grumer/M
Like other viruses, retroviruses attack cells and force them to produce more retroviruses. This is only the first stage of the attack, because retroviruses implant into the genome and become part of our DNA. Authors: 3sat/nano/Docstation/Johan von Mirbach/Anna Grün/Riccardo Giese/Nico Schlegel, Max
There are probably 100 million different types of viruses. Their attacks always follow the same pattern. The viruses attach to a cell, transfer their genetic material and force the host cells to produce new viruses. Author: 3sat/nano/Docstation/Johan von Mirbach/Anna Grün/Riccardo Giese/Nico Schleg
Dripstones reveal a lot about climate changes in the course of the earth's history. Scientists can tell from the fine stone structures how often and how much it has rained in the past millennia. Author: ZDF/Terra X/ Story House Productions/ Sigrun Laste/ Jürgen Rehberg, André Götzmann/ Ronald Rist/
The Roman Empire defines its borders. Hadrian's Wall in Britain and the approximately 550-kilometer-long Limes in Germania are imposing security systems against unwanted immigrants and hostile attacks. Author: ZDF/Terra X/ Story House Productions/ Sigrun Laste/ Jürgen Rehberg, André Götzmann/ Oliv
14 billion years ago, the Big Bang gradually created suns, planets, galaxies and stars. Unique: the earth. Water, heat and the protective shield of the atmosphere create conditions that are probably unique in the entire universe. Author: ZDF/Terra X/ Story House Productions/ Sigrun Laste/ Jürgen Re
The coronavirus is an RNA virus. An RNA is chemically more susceptible than a DNA. Errors occur more frequently during copying, and the virus mutates. Our immune system reacts slowly to it, vaccine development is more difficult. Author: 3sat/nano/Docstation/Johan von Mirbach/Anna Grün/Riccardo Gies
Learn what comets are and how they inform us about the early solar system, in this video adapted from NASA. Comets, which are made of frozen gases, ice, dust, and rock, are typically in a deep freeze in the outer solar system. But when a comet nears the Sun, it loses streams of gases and forms a com
So how do you tell if someone is lying? Liars can use many tactics like changing up their tone of speaking, manipulating their facial expressions, being overly nice to you, etc. But how exactly do you know when you're being lied to? In this video, we have you covered. If you find yourself identifyin
Back to school 2020 can be stressful, and we at Psych2Go recognize this. Here are 5 ways school can hurt your mental health. If you're feeling stressed out, depressed, or anxious at school, know that you aren't alone. By recognizing the 5 ways school can hurt your mental health, you can seek appropr
