Science.
10 random takeaways.
1.
Academic paper summary:
Divide the lower period into three ages: Stone, Fire, and Cultural. Divide the middle period into two ages: Symbolic and Cognitive. Finally, redefine the upper as “prehistory” and end it when our stories start: about 4,000 BCE.
2.
Quote:
- Charles Darwin.
- 1859.
Evolution is not about desire, nor is it merely a contest of strength or intellect. It’s about reproductive success. Those born into lines with inherited traits better suited to the current and evolving environment are more likely to survive, reproduce, and pass those traits on. Over millennia, these differentiating traits accumulate within specific lines. Populations can diverge, leading to different “races,” and eventually to separate species unable to interbreed.
3.
From History: ~78 Million years ago (+/- 4 million).
Led to common birds: crows, sparrows, robins, hawks, owls, hummingbirds, etc.
Neoaves is the enormous living bird branch that includes nearly all the birds most people see: crows, blackbirds, sparrows, robins, hawks, owls, hummingbirds, parrots, pigeons, woodpeckers, penguins, and flamingos. All birds except the ostrich-tinamou and the duck-chicken branches.
4.
Entanglement is one of the clearest examples of nature refusing to obey common sense. The particles do not behave like fully separate little objects. They behave more like pieces of one deeper physical relationship. That is why entanglement feels so strange, and why it matters so much to both physics and philosophy.
5.
Quote:
- Charles Darwin.
- 1859.
From History:
In On the Origin of Species, first published in 1859 in London, Darwin gave only a short nod to human origins, but it was enough to point the future in a new direction. That small sentence rang the bell for what would later become paleoanthropology.
6.
From History: Lived ~161 to 146 million years ago.
28–33.5 m long: longer, whiplike, slimmer.
Diplodocus shows the slimmer side of the classic giant-necked sauropods. Compared with its heavier cousins, it stretched the same basic body plan into a longer, leaner form, reminding us that even among the giant plant-eaters, evolution was already experimenting with different proportions and ways of being enormous.
7.
The earliest flowers had simple, similar-looking floral parts rather than the distinct green sepals and colorful petals common today. Botanists call these parts tepals. They are not merely primitive petals, but a living reminder that flowers evolved gradually and that older floral patterns still survive in modern plants.
8.
Quote:
- Copernicus.
- 1543.
From History:
Copernicus didn’t argue that heliocentrism felt right or sounded better. He argued that it worked. When competing explanations grew increasingly complex, he chose the one that aligned most cleanly with observation. Truth, in this view, isn’t about persuasion—it’s about coherence. The simplest explanation that fits reality deserves serious attention.
9.
From History: 4.3 Billion Years Ago
4.5 to 4 Billion Years Ago
Earth’s second atmosphere formed as the planet cooled, releasing gases through intense volcanic outgassing. Unlike the first atmosphere, it was dominated by water vapor, carbon dioxide, and nitrogen: with no free oxygen. As water vapor condensed, the first freshwater oceans formed.
10.
“Ions” in river water, electrolytes, and ion hair dryers all arise from ionization, the process by which atoms or molecules gain or lose electrons and become charged. Whether biology, chemistry, or consumer tech, the underlying physics is identical.
The End. Refresh for another set.