The Plank Era occurred in the first part of the first millisecond after the singularity. Current estimated put it at up to 10−43 seconds after the Big Bang. The term “era” is used for this micro-duration as a sort of tip of the hat to Einstein’s Relativity. It reflects a conceptual approach to time that differs from our everyday experience. This speculative era represents the very beginning of the universe, immediately following the singularity. The physics of this period is still not fully understood, as it requires a theory that unifies general relativity and quantum mechanics (quantum gravity). Temperatures and energies were so high that the four fundamental forces (gravity, electromagnetism, the weak nuclear force, and the strong nuclear force) are thought to have been unified.
Science.
3 random tidbit stories in about 3 minutes.
2.
Science Story.
Slightly greater range of movement and precision: Around 2 to 3 million years ago, the evolution of the human thumb reached a pivotal point. Early hominins, such as Australopithecus and later Homo habilis, exhibited a thumb that was more similar to that of modern humans. This thumb was capable of a greater range of movement and precision, which was crucial for the development of advanced tool-making techniques. The ability to craft and use tools not only provided a survival advantage but also facilitated the development of culture and technology. The evolution of the human thumb is a key factor in the story of human evolution, highlighting the interplay between biological adaptation and cultural innovation.
That Science Story,
3.
Science Vocabulary.
An idea is rationally true when it is logically consistent inside a rational framework. It does not need to be directly measured like an empirical claim, but it must hold together. It must make sense within the system that supports it.
Math is the clearest example. Natural numbers are rationally true within a mathematical framework. You do not need to find the number three under a rock. You understand it through logic, relation, and structure. The same is true for many ideas in ethics, law, politics, and philosophy.
But rationally true does not mean magically true in the material world. A political theory can be coherent and still fail in practice. An ethical rule can be logical but too rigid for real life. When a rational idea makes empirical claims, those claims must be tested.
In TST, rationally true ideas matter because human beings think through frameworks. We need logic, categories, values, principles, and models. They do not replace empirical truth, but they help organize it.
That Science Vocabulary,
The end. Refresh for another set.
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